diff --git a/go/operation/data_struts.go b/go/operation/data_struts.go
index 4980f9913..bfc53aa50 100644
--- a/go/operation/data_struts.go
+++ b/go/operation/data_struts.go
@@ -2,5 +2,6 @@ package operation
 
 type JoinResult struct {
 	VolumeSizeLimit uint64 `json:"VolumeSizeLimit,omitempty"`
+	SecretKey       string `json:"secretKey,omitempty"`
 	Error           string `json:"error,omitempty"`
 }
diff --git a/go/operation/delete_content.go b/go/operation/delete_content.go
index 064cc8df9..afd1bbc34 100644
--- a/go/operation/delete_content.go
+++ b/go/operation/delete_content.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 	"sync"
 
+	"github.com/chrislusf/weed-fs/go/security"
 	"github.com/chrislusf/weed-fs/go/util"
 )
 
@@ -16,12 +17,12 @@ type DeleteResult struct {
 	Error string `json:"error,omitempty"`
 }
 
-func DeleteFile(master string, fileId string) error {
+func DeleteFile(master string, fileId string, jwt security.EncodedJwt) error {
 	fileUrl, err := LookupFileId(master, fileId)
 	if err != nil {
 		return err
 	}
-	return util.Delete(fileUrl)
+	return util.Delete(fileUrl, jwt)
 }
 
 func ParseFileId(fid string) (vid string, key_cookie string, err error) {
diff --git a/go/operation/submit.go b/go/operation/submit.go
index 3ab6d78d9..03551b1e8 100644
--- a/go/operation/submit.go
+++ b/go/operation/submit.go
@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/security"
 )
 
 type FilePart struct {
@@ -34,7 +35,10 @@ type SubmitResult struct {
 	Error    string `json:"error,omitempty"`
 }
 
-func SubmitFiles(master string, files []FilePart, replication string, collection string, ttl string, maxMB int) ([]SubmitResult, error) {
+func SubmitFiles(master string, files []FilePart,
+	replication string, collection string, ttl string, maxMB int,
+	secret security.Secret,
+) ([]SubmitResult, error) {
 	results := make([]SubmitResult, len(files))
 	for index, file := range files {
 		results[index].FileName = file.FileName
@@ -54,7 +58,7 @@ func SubmitFiles(master string, files []FilePart, replication string, collection
 		file.Server = ret.PublicUrl
 		file.Replication = replication
 		file.Collection = collection
-		results[index].Size, err = file.Upload(maxMB, master)
+		results[index].Size, err = file.Upload(maxMB, master, secret)
 		if err != nil {
 			results[index].Error = err.Error()
 		}
@@ -101,7 +105,8 @@ func newFilePart(fullPathFilename string) (ret FilePart, err error) {
 	return ret, nil
 }
 
-func (fi FilePart) Upload(maxMB int, master string) (retSize uint32, err error) {
+func (fi FilePart) Upload(maxMB int, master string, secret security.Secret) (retSize uint32, err error) {
+	jwt := security.GenJwt(secret, fi.Fid)
 	fileUrl := "http://" + fi.Server + "/" + fi.Fid
 	if fi.ModTime != 0 {
 		fileUrl += "?ts=" + strconv.Itoa(int(fi.ModTime))
@@ -114,16 +119,20 @@ func (fi FilePart) Upload(maxMB int, master string) (retSize uint32, err error)
 		chunks := fi.FileSize/chunkSize + 1
 		fids := make([]string, 0)
 		for i := int64(0); i < chunks; i++ {
-			id, count, e := upload_one_chunk(fi.FileName+"-"+strconv.FormatInt(i+1, 10), io.LimitReader(fi.Reader, chunkSize), master, fi.Replication, fi.Collection, fi.Ttl)
+			id, count, e := upload_one_chunk(
+				fi.FileName+"-"+strconv.FormatInt(i+1, 10),
+				io.LimitReader(fi.Reader, chunkSize),
+				master, fi.Replication, fi.Collection, fi.Ttl,
+				jwt)
 			if e != nil {
 				return 0, e
 			}
 			fids = append(fids, id)
 			retSize += count
 		}
-		err = upload_file_id_list(fileUrl, fi.FileName+"-list", fids)
+		err = upload_file_id_list(fileUrl, fi.FileName+"-list", fids, jwt)
 	} else {
-		ret, e := Upload(fileUrl, fi.FileName, fi.Reader, fi.IsGzipped, fi.MimeType)
+		ret, e := Upload(fileUrl, fi.FileName, fi.Reader, fi.IsGzipped, fi.MimeType, jwt)
 		if e != nil {
 			return 0, e
 		}
@@ -132,24 +141,27 @@ func (fi FilePart) Upload(maxMB int, master string) (retSize uint32, err error)
 	return
 }
 
-func upload_one_chunk(filename string, reader io.Reader, master, replication string, collection string, ttl string) (fid string, size uint32, e error) {
+func upload_one_chunk(filename string, reader io.Reader, master,
+	replication string, collection string, ttl string, jwt security.EncodedJwt,
+) (fid string, size uint32, e error) {
 	ret, err := Assign(master, 1, replication, collection, ttl)
 	if err != nil {
 		return "", 0, err
 	}
 	fileUrl, fid := "http://"+ret.Url+"/"+ret.Fid, ret.Fid
 	glog.V(4).Info("Uploading part ", filename, " to ", fileUrl, "...")
-	uploadResult, uploadError := Upload(fileUrl, filename, reader, false, "application/octet-stream")
+	uploadResult, uploadError := Upload(fileUrl, filename, reader, false,
+		"application/octet-stream", jwt)
 	if uploadError != nil {
 		return fid, 0, uploadError
 	}
 	return fid, uploadResult.Size, nil
 }
 
-func upload_file_id_list(fileUrl, filename string, fids []string) error {
+func upload_file_id_list(fileUrl, filename string, fids []string, jwt security.EncodedJwt) error {
 	var buf bytes.Buffer
 	buf.WriteString(strings.Join(fids, "\n"))
 	glog.V(4).Info("Uploading final list ", filename, " to ", fileUrl, "...")
-	_, e := Upload(fileUrl, filename, &buf, false, "text/plain")
+	_, e := Upload(fileUrl, filename, &buf, false, "text/plain", jwt)
 	return e
 }
diff --git a/go/operation/upload_content.go b/go/operation/upload_content.go
index 480d76dca..533be82cb 100644
--- a/go/operation/upload_content.go
+++ b/go/operation/upload_content.go
@@ -15,6 +15,7 @@ import (
 	"strings"
 
 	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/security"
 )
 
 type UploadResult struct {
@@ -35,13 +36,13 @@ func init() {
 
 var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
 
-func Upload(uploadUrl string, filename string, reader io.Reader, isGzipped bool, mtype string) (*UploadResult, error) {
+func Upload(uploadUrl string, filename string, reader io.Reader, isGzipped bool, mtype string, jwt security.EncodedJwt) (*UploadResult, error) {
 	return upload_content(uploadUrl, func(w io.Writer) (err error) {
 		_, err = io.Copy(w, reader)
 		return
-	}, filename, isGzipped, mtype)
+	}, filename, isGzipped, mtype, jwt)
 }
-func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error, filename string, isGzipped bool, mtype string) (*UploadResult, error) {
+func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error, filename string, isGzipped bool, mtype string, jwt security.EncodedJwt) (*UploadResult, error) {
 	body_buf := bytes.NewBufferString("")
 	body_writer := multipart.NewWriter(body_buf)
 	h := make(textproto.MIMEHeader)
@@ -55,6 +56,9 @@ func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error
 	if isGzipped {
 		h.Set("Content-Encoding", "gzip")
 	}
+	if jwt != "" {
+		h.Set("Authorization", "BEARER "+string(jwt))
+	}
 	file_writer, cp_err := body_writer.CreatePart(h)
 	if cp_err != nil {
 		glog.V(0).Infoln("error creating form file", cp_err.Error())
diff --git a/go/security/guard.go b/go/security/guard.go
index a2beb48f4..d39985034 100644
--- a/go/security/guard.go
+++ b/go/security/guard.go
@@ -5,11 +5,8 @@ import (
 	"fmt"
 	"net"
 	"net/http"
-	"strings"
-	"time"
 
 	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/dgrijalva/jwt-go"
 )
 
 var (
@@ -44,24 +41,38 @@ https://github.com/pkieltyka/jwtauth/blob/master/jwtauth.go
 */
 type Guard struct {
 	whiteList []string
-	secretKey string
+	SecretKey Secret
 
 	isActive bool
 }
 
 func NewGuard(whiteList []string, secretKey string) *Guard {
-	g := &Guard{whiteList: whiteList, secretKey: secretKey}
-	g.isActive = len(g.whiteList) != 0 || len(g.secretKey) != 0
+	g := &Guard{whiteList: whiteList, SecretKey: Secret(secretKey)}
+	g.isActive = len(g.whiteList) != 0 || len(g.SecretKey) != 0
 	return g
 }
 
+func (g *Guard) WhiteList(f func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) {
+	if !g.isActive {
+		//if no security needed, just skip all checkings
+		return f
+	}
+	return func(w http.ResponseWriter, r *http.Request) {
+		if err := g.checkWhiteList(w, r); err != nil {
+			w.WriteHeader(http.StatusUnauthorized)
+			return
+		}
+		f(w, r)
+	}
+}
+
 func (g *Guard) Secure(f func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) {
 	if !g.isActive {
 		//if no security needed, just skip all checkings
 		return f
 	}
 	return func(w http.ResponseWriter, r *http.Request) {
-		if err := g.doCheck(w, r); err != nil {
+		if err := g.checkJwt(w, r); err != nil {
 			w.WriteHeader(http.StatusUnauthorized)
 			return
 		}
@@ -69,76 +80,48 @@ func (g *Guard) Secure(f func(w http.ResponseWriter, r *http.Request)) func(w ht
 	}
 }
 
-func (g *Guard) NewToken() (tokenString string, err error) {
-	m := make(map[string]interface{})
-	m["exp"] = time.Now().Unix() + 10
-	return g.Encode(m)
-}
-
-func (g *Guard) Encode(claims map[string]interface{}) (tokenString string, err error) {
-	if !g.isActive {
-		return "", nil
+func (g *Guard) checkWhiteList(w http.ResponseWriter, r *http.Request) error {
+	if len(g.whiteList) == 0 {
+		return nil
 	}
 
-	t := jwt.New(jwt.GetSigningMethod("HS256"))
-	t.Claims = claims
-	return t.SignedString(g.secretKey)
-}
-
-func (g *Guard) Decode(tokenString string) (token *jwt.Token, err error) {
-	return jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
-		return g.secretKey, nil
-	})
-}
-
-func (g *Guard) doCheck(w http.ResponseWriter, r *http.Request) error {
-	if len(g.whiteList) != 0 {
-		host, _, err := net.SplitHostPort(r.RemoteAddr)
-		if err == nil {
-			for _, ip := range g.whiteList {
-				if ip == host {
-					return nil
-				}
+	host, _, err := net.SplitHostPort(r.RemoteAddr)
+	if err == nil {
+		for _, ip := range g.whiteList {
+			if ip == host {
+				return nil
 			}
 		}
 	}
 
-	if len(g.secretKey) != 0 {
+	glog.V(1).Infof("Not in whitelist: %s", r.RemoteAddr)
+	return fmt.Errorf("Not in whitelis: %s", r.RemoteAddr)
+}
 
-		// Get token from query params
-		tokenStr := r.URL.Query().Get("jwt")
+func (g *Guard) checkJwt(w http.ResponseWriter, r *http.Request) error {
+	if g.checkWhiteList(w, r) == nil {
+		return nil
+	}
 
-		// Get token from authorization header
-		if tokenStr == "" {
-			bearer := r.Header.Get("Authorization")
-			if len(bearer) > 7 && strings.ToUpper(bearer[0:6]) == "BEARER" {
-				tokenStr = bearer[7:]
-			}
-		}
+	if len(g.SecretKey) == 0 {
+		return nil
+	}
 
-		// Get token from cookie
-		if tokenStr == "" {
-			cookie, err := r.Cookie("jwt")
-			if err == nil {
-				tokenStr = cookie.Value
-			}
-		}
+	tokenStr := GetJwt(r)
 
-		if tokenStr == "" {
-			return ErrUnauthorized
-		}
-
-		// Verify the token
-		token, err := g.Decode(tokenStr)
-		if err != nil {
-			glog.V(1).Infof("Token verification error from %s: %v", r.RemoteAddr, err)
-			return ErrUnauthorized
-		}
-		if !token.Valid {
-			glog.V(1).Infof("Token invliad from %s: %v", r.RemoteAddr, tokenStr)
-			return ErrUnauthorized
-		}
+	if tokenStr == "" {
+		return ErrUnauthorized
+	}
 
+	// Verify the token
+	token, err := DecodeJwt(g.SecretKey, tokenStr)
+	if err != nil {
+		glog.V(1).Infof("Token verification error from %s: %v", r.RemoteAddr, err)
+		return ErrUnauthorized
+	}
+	if !token.Valid {
+		glog.V(1).Infof("Token invliad from %s: %v", r.RemoteAddr, tokenStr)
+		return ErrUnauthorized
 	}
 
 	glog.V(1).Infof("No permission from %s", r.RemoteAddr)
diff --git a/go/security/jwt.go b/go/security/jwt.go
new file mode 100644
index 000000000..fac91dd8e
--- /dev/null
+++ b/go/security/jwt.go
@@ -0,0 +1,72 @@
+package security
+
+import (
+	"net/http"
+	"strings"
+
+	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	jwt "github.com/dgrijalva/jwt-go"
+)
+
+type EncodedJwt string
+type Secret string
+
+func GenJwt(secret Secret, fileId string) EncodedJwt {
+	if secret == "" {
+		return ""
+	}
+
+	t := jwt.New(jwt.GetSigningMethod("HS256"))
+	t.Claims["exp"] = time.Now().Unix() + 10
+	t.Claims["sub"] = fileId
+	encoded, e := t.SignedString(secret)
+	if e != nil {
+		glog.V(0).Infof("Failed to sign claims: %v", t.Claims)
+		return ""
+	}
+	return EncodedJwt(encoded)
+}
+
+func GetJwt(r *http.Request) EncodedJwt {
+
+	// Get token from query params
+	tokenStr := r.URL.Query().Get("jwt")
+
+	// Get token from authorization header
+	if tokenStr == "" {
+		bearer := r.Header.Get("Authorization")
+		if len(bearer) > 7 && strings.ToUpper(bearer[0:6]) == "BEARER" {
+			tokenStr = bearer[7:]
+		}
+	}
+
+	// Get token from cookie
+	if tokenStr == "" {
+		cookie, err := r.Cookie("jwt")
+		if err == nil {
+			tokenStr = cookie.Value
+		}
+	}
+
+	return EncodedJwt(tokenStr)
+}
+
+func EncodeJwt(secret Secret, claims map[string]interface{}) (EncodedJwt, error) {
+	if secret == "" {
+		return "", nil
+	}
+
+	t := jwt.New(jwt.GetSigningMethod("HS256"))
+	t.Claims = claims
+	encoded, e := t.SignedString(secret)
+	return EncodedJwt(encoded), e
+}
+
+func DecodeJwt(secret Secret, tokenString EncodedJwt) (token *jwt.Token, err error) {
+	// check exp, nbf
+	return jwt.Parse(string(tokenString), func(token *jwt.Token) (interface{}, error) {
+		return secret, nil
+	})
+}
diff --git a/go/storage/store.go b/go/storage/store.go
index 2c4434b81..d280175f2 100644
--- a/go/storage/store.go
+++ b/go/storage/store.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/chrislusf/weed-fs/go/glog"
 	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/security"
 	"github.com/chrislusf/weed-fs/go/util"
 	"github.com/golang/protobuf/proto"
 )
@@ -260,7 +261,7 @@ func (s *Store) SetRack(rack string) {
 func (s *Store) SetBootstrapMaster(bootstrapMaster string) {
 	s.masterNodes = NewMasterNodes(bootstrapMaster)
 }
-func (s *Store) Join() (masterNode string, e error) {
+func (s *Store) Join() (masterNode string, secretKey security.Secret, e error) {
 	masterNode, e = s.masterNodes.findMaster()
 	if e != nil {
 		return
@@ -314,22 +315,23 @@ func (s *Store) Join() (masterNode string, e error) {
 
 	data, err := proto.Marshal(joinMessage)
 	if err != nil {
-		return "", err
+		return "", "", err
 	}
 
 	jsonBlob, err := util.PostBytes("http://"+masterNode+"/dir/join", data)
 	if err != nil {
 		s.masterNodes.reset()
-		return "", err
+		return "", "", err
 	}
 	var ret operation.JoinResult
 	if err := json.Unmarshal(jsonBlob, &ret); err != nil {
-		return masterNode, err
+		return masterNode, "", err
 	}
 	if ret.Error != "" {
-		return masterNode, errors.New(ret.Error)
+		return masterNode, "", errors.New(ret.Error)
 	}
 	s.volumeSizeLimit = ret.VolumeSizeLimit
+	secretKey = security.Secret(ret.SecretKey)
 	s.connected = true
 	return
 }
@@ -353,7 +355,7 @@ func (s *Store) Write(i VolumeId, n *Needle) (size uint32, err error) {
 			}
 			if s.volumeSizeLimit < v.ContentSize()+3*uint64(size) {
 				glog.V(0).Infoln("volume", i, "size", v.ContentSize(), "will exceed limit", s.volumeSizeLimit)
-				if _, e := s.Join(); e != nil {
+				if _, _, e := s.Join(); e != nil {
 					glog.V(0).Infoln("error when reporting size:", e)
 				}
 			}
diff --git a/go/topology/store_replicate.go b/go/topology/store_replicate.go
index 0c52f9d30..da426e587 100644
--- a/go/topology/store_replicate.go
+++ b/go/topology/store_replicate.go
@@ -7,11 +7,18 @@ import (
 
 	"github.com/chrislusf/weed-fs/go/glog"
 	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/security"
 	"github.com/chrislusf/weed-fs/go/storage"
 	"github.com/chrislusf/weed-fs/go/util"
 )
 
-func ReplicatedWrite(masterNode string, s *storage.Store, volumeId storage.VolumeId, needle *storage.Needle, r *http.Request) (size uint32, errorStatus string) {
+func ReplicatedWrite(masterNode string, s *storage.Store,
+	volumeId storage.VolumeId, needle *storage.Needle,
+	r *http.Request) (size uint32, errorStatus string) {
+
+	//check JWT
+	jwt := security.GetJwt(r)
+
 	ret, err := s.Write(volumeId, needle)
 	needToReplicate := !s.HasVolume(volumeId)
 	if err != nil {
@@ -27,7 +34,10 @@ func ReplicatedWrite(masterNode string, s *storage.Store, volumeId storage.Volum
 	if needToReplicate { //send to other replica locations
 		if r.FormValue("type") != "replicate" {
 			if !distributedOperation(masterNode, s, volumeId, func(location operation.Location) bool {
-				_, err := operation.Upload("http://"+location.Url+r.URL.Path+"?type=replicate&ts="+strconv.FormatUint(needle.LastModified, 10), string(needle.Name), bytes.NewReader(needle.Data), needle.IsGzipped(), string(needle.Mime))
+				_, err := operation.Upload(
+					"http://"+location.Url+r.URL.Path+"?type=replicate&ts="+strconv.FormatUint(needle.LastModified, 10),
+					string(needle.Name), bytes.NewReader(needle.Data), needle.IsGzipped(), string(needle.Mime),
+					jwt)
 				return err == nil
 			}) {
 				ret = 0
@@ -41,7 +51,7 @@ func ReplicatedWrite(masterNode string, s *storage.Store, volumeId storage.Volum
 				volumeId.String() + ": " + err.Error()
 		} else {
 			distributedOperation(masterNode, s, volumeId, func(location operation.Location) bool {
-				return nil == util.Delete("http://"+location.Url+r.URL.Path+"?type=replicate")
+				return nil == util.Delete("http://"+location.Url+r.URL.Path+"?type=replicate", jwt)
 			})
 		}
 	}
@@ -49,7 +59,13 @@ func ReplicatedWrite(masterNode string, s *storage.Store, volumeId storage.Volum
 	return
 }
 
-func ReplicatedDelete(masterNode string, store *storage.Store, volumeId storage.VolumeId, n *storage.Needle, r *http.Request) (ret uint32) {
+func ReplicatedDelete(masterNode string, store *storage.Store,
+	volumeId storage.VolumeId, n *storage.Needle,
+	r *http.Request) (ret uint32) {
+
+	//check JWT
+	jwt := security.GetJwt(r)
+
 	ret, err := store.Delete(volumeId, n)
 	if err != nil {
 		glog.V(0).Infoln("delete error:", err)
@@ -63,7 +79,7 @@ func ReplicatedDelete(masterNode string, store *storage.Store, volumeId storage.
 	if needToReplicate { //send to other replica locations
 		if r.FormValue("type") != "replicate" {
 			if !distributedOperation(masterNode, store, volumeId, func(location operation.Location) bool {
-				return nil == util.Delete("http://"+location.Url+r.URL.Path+"?type=replicate")
+				return nil == util.Delete("http://"+location.Url+r.URL.Path+"?type=replicate", jwt)
 			}) {
 				ret = 0
 			}
diff --git a/go/util/http_util.go b/go/util/http_util.go
index 08de56ba9..72cab76e1 100644
--- a/go/util/http_util.go
+++ b/go/util/http_util.go
@@ -7,6 +7,8 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
+
+	"github.com/chrislusf/weed-fs/go/security"
 )
 
 var (
@@ -63,8 +65,11 @@ func Get(url string) ([]byte, error) {
 	return b, nil
 }
 
-func Delete(url string) error {
+func Delete(url string, jwt security.EncodedJwt) error {
 	req, err := http.NewRequest("DELETE", url, nil)
+	if jwt != "" {
+		req.Header.Set("Authorization", "BEARER "+string(jwt))
+	}
 	if err != nil {
 		return err
 	}
diff --git a/go/weed/benchmark.go b/go/weed/benchmark.go
index 04ab4307d..5a91d9d58 100644
--- a/go/weed/benchmark.go
+++ b/go/weed/benchmark.go
@@ -16,6 +16,7 @@ import (
 
 	"github.com/chrislusf/weed-fs/go/glog"
 	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/security"
 	"github.com/chrislusf/weed-fs/go/util"
 )
 
@@ -32,6 +33,7 @@ type BenchmarkOptions struct {
 	collection       *string
 	cpuprofile       *string
 	maxCpu           *int
+	secretKey        *string
 	vid2server       map[string]string //cache for vid locations
 
 }
@@ -56,6 +58,7 @@ func init() {
 	b.collection = cmdBenchmark.Flag.String("collection", "benchmark", "write data to this collection")
 	b.cpuprofile = cmdBenchmark.Flag.String("cpuprofile", "", "cpu profile output file")
 	b.maxCpu = cmdBenchmark.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
+	b.secretKey = cmdBenchmark.Flag.String("secure.secret", "", "secret to encrypt Json Web Token(JWT)")
 	b.vid2server = make(map[string]string)
 	sharedBytes = make([]byte, 1024)
 }
@@ -181,6 +184,8 @@ func writeFiles(idChan chan int, fileIdLineChan chan string, s *stat) {
 	defer wait.Done()
 	delayedDeleteChan := make(chan *delayedFile, 100)
 	var waitForDeletions sync.WaitGroup
+	secret := security.Secret(*b.secretKey)
+
 	for i := 0; i < 7; i++ {
 		waitForDeletions.Add(1)
 		go func() {
@@ -189,7 +194,8 @@ func writeFiles(idChan chan int, fileIdLineChan chan string, s *stat) {
 				if df.enterTime.After(time.Now()) {
 					time.Sleep(df.enterTime.Sub(time.Now()))
 				}
-				if e := util.Delete("http://" + df.fp.Server + "/" + df.fp.Fid); e == nil {
+				if e := util.Delete("http://"+df.fp.Server+"/"+df.fp.Fid,
+					security.GenJwt(secret, df.fp.Fid)); e == nil {
 					s.completed++
 				} else {
 					s.failed++
@@ -204,7 +210,7 @@ func writeFiles(idChan chan int, fileIdLineChan chan string, s *stat) {
 		fp := &operation.FilePart{Reader: &FakeReader{id: uint64(id), size: fileSize}, FileSize: fileSize}
 		if assignResult, err := operation.Assign(*b.server, 1, "", *b.collection, ""); err == nil {
 			fp.Server, fp.Fid, fp.Collection = assignResult.Url, assignResult.Fid, *b.collection
-			if _, err := fp.Upload(0, *b.server); err == nil {
+			if _, err := fp.Upload(0, *b.server, secret); err == nil {
 				if rand.Intn(100) < *b.deletePercentage {
 					s.total++
 					delayedDeleteChan <- &delayedFile{time.Now().Add(time.Second), fp}
diff --git a/go/weed/filer.go b/go/weed/filer.go
index 4e7191e34..fd7dcdf88 100644
--- a/go/weed/filer.go
+++ b/go/weed/filer.go
@@ -22,6 +22,7 @@ type FilerOptions struct {
 	defaultReplicaPlacement *string
 	dir                     *string
 	redirectOnRead          *bool
+	secretKey               *string
 	cassandra_server        *string
 	cassandra_keyspace      *string
 	redis_server            *string
@@ -40,6 +41,8 @@ func init() {
 	f.cassandra_keyspace = cmdFiler.Flag.String("cassandra.keyspace", "seaweed", "keyspace of the cassandra server")
 	f.redis_server = cmdFiler.Flag.String("redis.server", "", "host:port of the redis server, e.g., 127.0.0.1:6379")
 	f.redis_database = cmdFiler.Flag.Int("redis.database", 0, "the database on the redis server")
+	f.secretKey = cmdFiler.Flag.String("secure.secret", "", "secret to encrypt Json Web Token(JWT)")
+
 }
 
 var cmdFiler = &Command{
@@ -73,6 +76,7 @@ func runFiler(cmd *Command, args []string) bool {
 	r := http.NewServeMux()
 	_, nfs_err := weed_server.NewFilerServer(r, *f.port, *f.master, *f.dir, *f.collection,
 		*f.defaultReplicaPlacement, *f.redirectOnRead,
+		*f.secretKey,
 		*f.cassandra_server, *f.cassandra_keyspace,
 		*f.redis_server, *f.redis_database,
 	)
diff --git a/go/weed/master.go b/go/weed/master.go
index af63d8c22..690662e1c 100644
--- a/go/weed/master.go
+++ b/go/weed/master.go
@@ -41,7 +41,7 @@ var (
 	mMaxCpu                 = cmdMaster.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
 	garbageThreshold        = cmdMaster.Flag.String("garbageThreshold", "0.3", "threshold to vacuum and reclaim spaces")
 	masterWhiteListOption   = cmdMaster.Flag.String("whiteList", "", "comma separated Ip addresses having write permission. No limit if empty.")
-	masterSecureKey         = cmdMaster.Flag.String("secure.key", "", "secret key to check permission")
+	masterSecureKey         = cmdMaster.Flag.String("secure.secret", "", "secret to encrypt Json Web Token(JWT)")
 
 	masterWhiteList []string
 )
diff --git a/go/weed/server.go b/go/weed/server.go
index eeda57b96..e86d0ba75 100644
--- a/go/weed/server.go
+++ b/go/weed/server.go
@@ -56,7 +56,7 @@ var (
 	serverRack                    = cmdServer.Flag.String("rack", "", "current volume server's rack name")
 	serverWhiteListOption         = cmdServer.Flag.String("whiteList", "", "comma separated Ip addresses having write permission. No limit if empty.")
 	serverPeers                   = cmdServer.Flag.String("master.peers", "", "other master nodes in comma separated ip:masterPort list")
-	serverSecureKey               = cmdServer.Flag.String("secure.key", "", "secret key to ensure authenticated access")
+	serverSecureKey               = cmdServer.Flag.String("secure.secret", "", "secret to encrypt Json Web Token(JWT)")
 	serverGarbageThreshold        = cmdServer.Flag.String("garbageThreshold", "0.3", "threshold to vacuum and reclaim spaces")
 	masterPort                    = cmdServer.Flag.Int("master.port", 9333, "master server http listen port")
 	masterMetaFolder              = cmdServer.Flag.String("master.dir", "", "data directory to store meta data, default to same as -dir specified")
@@ -86,10 +86,10 @@ func init() {
 	filerOptions.cassandra_keyspace = cmdServer.Flag.String("filer.cassandra.keyspace", "seaweed", "keyspace of the cassandra server")
 	filerOptions.redis_server = cmdServer.Flag.String("filer.redis.server", "", "host:port of the redis server, e.g., 127.0.0.1:6379")
 	filerOptions.redis_database = cmdServer.Flag.Int("filer.redis.database", 0, "the database on the redis server")
-
 }
 
 func runServer(cmd *Command, args []string) bool {
+	filerOptions.secretKey = serverSecureKey
 	if *serverOptions.cpuprofile != "" {
 		f, err := os.Create(*serverOptions.cpuprofile)
 		if err != nil {
@@ -162,6 +162,7 @@ func runServer(cmd *Command, args []string) bool {
 			r := http.NewServeMux()
 			_, nfs_err := weed_server.NewFilerServer(r, *filerOptions.port, *filerOptions.master, *filerOptions.dir, *filerOptions.collection,
 				*filerOptions.defaultReplicaPlacement, *filerOptions.redirectOnRead,
+				*filerOptions.secretKey,
 				"", "",
 				"", 0,
 			)
diff --git a/go/weed/upload.go b/go/weed/upload.go
index 2d67c0bd9..eff259d1f 100644
--- a/go/weed/upload.go
+++ b/go/weed/upload.go
@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 
 	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/security"
 )
 
 var (
@@ -15,6 +16,7 @@ var (
 	uploadDir         *string
 	uploadTtl         *string
 	include           *string
+	uploadSecretKey   *string
 	maxMB             *int
 )
 
@@ -28,13 +30,14 @@ func init() {
 	uploadCollection = cmdUpload.Flag.String("collection", "", "optional collection name")
 	uploadTtl = cmdUpload.Flag.String("ttl", "", "time to live, e.g.: 1m, 1h, 1d, 1M, 1y")
 	maxMB = cmdUpload.Flag.Int("maxMB", 0, "split files larger than the limit")
+	uploadSecretKey = cmdUpload.Flag.String("secure.secret", "", "secret to encrypt Json Web Token(JWT)")
 }
 
 var cmdUpload = &Command{
 	UsageLine: "upload -server=localhost:9333 file1 [file2 file3]\n upload -server=localhost:9333 -dir=one_directory -include=*.pdf",
 	Short:     "upload one or a list of files",
 	Long: `upload one or a list of files, or batch upload one whole folder recursively.
-  
+
   If uploading a list of files:
   It uses consecutive file keys for the list of files.
   e.g. If the file1 uses key k, file2 can be read via k_1
@@ -42,18 +45,19 @@ var cmdUpload = &Command{
   If uploading a whole folder recursively:
   All files under the folder and subfolders will be uploaded, each with its own file key.
   Optional parameter "-include" allows you to specify the file name patterns.
-  
+
   If any file has a ".gz" extension, the content are considered gzipped already, and will be stored as is.
   This can save volume server's gzipped processing and allow customizable gzip compression level.
   The file name will strip out ".gz" and stored. For example, "jquery.js.gz" will be stored as "jquery.js".
-  
-  If "maxMB" is set to a positive number, files larger than it would be split into chunks and uploaded separatedly. 
-  The list of file ids of those chunks would be stored in an additional chunk, and this additional chunk's file id would be returned. 
+
+  If "maxMB" is set to a positive number, files larger than it would be split into chunks and uploaded separatedly.
+  The list of file ids of those chunks would be stored in an additional chunk, and this additional chunk's file id would be returned.
 
   `,
 }
 
 func runUpload(cmd *Command, args []string) bool {
+	secret := security.Secret(*uploadSecretKey)
 	if len(cmdUpload.Flag.Args()) == 0 {
 		if *uploadDir == "" {
 			return false
@@ -70,7 +74,9 @@ func runUpload(cmd *Command, args []string) bool {
 					if e != nil {
 						return e
 					}
-					results, e := operation.SubmitFiles(*server, parts, *uploadReplication, *uploadCollection, *uploadTtl, *maxMB)
+					results, e := operation.SubmitFiles(*server, parts,
+						*uploadReplication, *uploadCollection,
+						*uploadTtl, *maxMB, secret)
 					bytes, _ := json.Marshal(results)
 					fmt.Println(string(bytes))
 					if e != nil {
@@ -87,7 +93,9 @@ func runUpload(cmd *Command, args []string) bool {
 		if e != nil {
 			fmt.Println(e.Error())
 		}
-		results, _ := operation.SubmitFiles(*server, parts, *uploadReplication, *uploadCollection, *uploadTtl, *maxMB)
+		results, _ := operation.SubmitFiles(*server, parts,
+			*uploadReplication, *uploadCollection,
+			*uploadTtl, *maxMB, secret)
 		bytes, _ := json.Marshal(results)
 		fmt.Println(string(bytes))
 	}
diff --git a/go/weed/weed_server/common.go b/go/weed/weed_server/common.go
index a2d93c246..095652a6b 100644
--- a/go/weed/weed_server/common.go
+++ b/go/weed/weed_server/common.go
@@ -12,6 +12,7 @@ import (
 
 	"github.com/chrislusf/weed-fs/go/glog"
 	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/security"
 	"github.com/chrislusf/weed-fs/go/stats"
 	"github.com/chrislusf/weed-fs/go/storage"
 	"github.com/chrislusf/weed-fs/go/util"
@@ -75,6 +76,7 @@ func debug(params ...interface{}) {
 }
 
 func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string) {
+	jwt := security.GetJwt(r)
 	m := make(map[string]interface{})
 	if r.Method != "POST" {
 		writeJsonError(w, r, http.StatusMethodNotAllowed, errors.New("Only submit via POST!"))
@@ -102,7 +104,7 @@ func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl st
 	}
 
 	debug("upload file to store", url)
-	uploadResult, err := operation.Upload(url, fname, bytes.NewReader(data), isGzipped, mimeType)
+	uploadResult, err := operation.Upload(url, fname, bytes.NewReader(data), isGzipped, mimeType, jwt)
 	if err != nil {
 		writeJsonError(w, r, http.StatusInternalServerError, err)
 		return
diff --git a/go/weed/weed_server/filer_server.go b/go/weed/weed_server/filer_server.go
index b43e1965b..1309e4486 100644
--- a/go/weed/weed_server/filer_server.go
+++ b/go/weed/weed_server/filer_server.go
@@ -10,6 +10,7 @@ import (
 	"github.com/chrislusf/weed-fs/go/filer/flat_namespace"
 	"github.com/chrislusf/weed-fs/go/filer/redis_store"
 	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/security"
 )
 
 type FilerServer struct {
@@ -18,11 +19,13 @@ type FilerServer struct {
 	collection         string
 	defaultReplication string
 	redirectOnRead     bool
+	secret             security.Secret
 	filer              filer.Filer
 }
 
 func NewFilerServer(r *http.ServeMux, port int, master string, dir string, collection string,
 	replication string, redirectOnRead bool,
+	secret string,
 	cassandra_server string, cassandra_keyspace string,
 	redis_server string, redis_database int,
 ) (fs *FilerServer, err error) {
@@ -56,3 +59,7 @@ func NewFilerServer(r *http.ServeMux, port int, master string, dir string, colle
 
 	return fs, nil
 }
+
+func (fs *FilerServer) jwt(fileId string) security.EncodedJwt {
+	return security.GenJwt(fs.secret, fileId)
+}
diff --git a/go/weed/weed_server/filer_server_handlers.go b/go/weed/weed_server/filer_server_handlers.go
index ac894771a..6278e5dad 100644
--- a/go/weed/weed_server/filer_server_handlers.go
+++ b/go/weed/weed_server/filer_server_handlers.go
@@ -170,7 +170,7 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 		if ret.Name != "" {
 			path += ret.Name
 		} else {
-			operation.DeleteFile(fs.master, assignResult.Fid) //clean up
+			operation.DeleteFile(fs.master, assignResult.Fid, fs.jwt(assignResult.Fid)) //clean up
 			glog.V(0).Infoln("Can not to write to folder", path, "without a file name!")
 			writeJsonError(w, r, http.StatusInternalServerError,
 				errors.New("Can not to write to folder "+path+" without a file name"))
@@ -179,7 +179,7 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 	}
 	glog.V(4).Infoln("saving", path, "=>", assignResult.Fid)
 	if db_err := fs.filer.CreateFile(path, assignResult.Fid); db_err != nil {
-		operation.DeleteFile(fs.master, assignResult.Fid) //clean up
+		operation.DeleteFile(fs.master, assignResult.Fid, fs.jwt(assignResult.Fid)) //clean up
 		glog.V(0).Infof("failing to write %s to filer server : %v", path, db_err)
 		writeJsonError(w, r, http.StatusInternalServerError, db_err)
 		return
@@ -199,7 +199,7 @@ func (fs *FilerServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
 	} else {
 		fid, err = fs.filer.DeleteFile(r.URL.Path)
 		if err == nil {
-			err = operation.DeleteFile(fs.master, fid)
+			err = operation.DeleteFile(fs.master, fid, fs.jwt(fid))
 		}
 	}
 	if err == nil {
diff --git a/go/weed/weed_server/master_server.go b/go/weed/weed_server/master_server.go
index 056b1fe7b..dc79c733a 100644
--- a/go/weed/weed_server/master_server.go
+++ b/go/weed/weed_server/master_server.go
@@ -23,6 +23,7 @@ type MasterServer struct {
 	pulseSeconds            int
 	defaultReplicaPlacement string
 	garbageThreshold        string
+	guard                   *security.Guard
 
 	Topo   *topology.Topology
 	vg     *topology.VolumeGrowth
@@ -57,22 +58,22 @@ func NewMasterServer(r *mux.Router, port int, metaFolder string,
 	ms.vg = topology.NewDefaultVolumeGrowth()
 	glog.V(0).Infoln("Volume Size Limit is", volumeSizeLimitMB, "MB")
 
-	guard := security.NewGuard(whiteList, secureKey)
+	ms.guard = security.NewGuard(whiteList, secureKey)
 
-	r.HandleFunc("/dir/assign", ms.proxyToLeader(guard.Secure(ms.dirAssignHandler)))
-	r.HandleFunc("/dir/lookup", ms.proxyToLeader(guard.Secure(ms.dirLookupHandler)))
-	r.HandleFunc("/dir/join", ms.proxyToLeader(guard.Secure(ms.dirJoinHandler)))
-	r.HandleFunc("/dir/status", ms.proxyToLeader(guard.Secure(ms.dirStatusHandler)))
-	r.HandleFunc("/col/delete", ms.proxyToLeader(guard.Secure(ms.collectionDeleteHandler)))
-	r.HandleFunc("/vol/lookup", ms.proxyToLeader(guard.Secure(ms.volumeLookupHandler)))
-	r.HandleFunc("/vol/grow", ms.proxyToLeader(guard.Secure(ms.volumeGrowHandler)))
-	r.HandleFunc("/vol/status", ms.proxyToLeader(guard.Secure(ms.volumeStatusHandler)))
-	r.HandleFunc("/vol/vacuum", ms.proxyToLeader(guard.Secure(ms.volumeVacuumHandler)))
-	r.HandleFunc("/submit", guard.Secure(ms.submitFromMasterServerHandler))
-	r.HandleFunc("/delete", guard.Secure(ms.deleteFromMasterServerHandler))
+	r.HandleFunc("/dir/assign", ms.proxyToLeader(ms.guard.WhiteList(ms.dirAssignHandler)))
+	r.HandleFunc("/dir/lookup", ms.proxyToLeader(ms.guard.WhiteList(ms.dirLookupHandler)))
+	r.HandleFunc("/dir/join", ms.proxyToLeader(ms.guard.WhiteList(ms.dirJoinHandler)))
+	r.HandleFunc("/dir/status", ms.proxyToLeader(ms.guard.WhiteList(ms.dirStatusHandler)))
+	r.HandleFunc("/col/delete", ms.proxyToLeader(ms.guard.WhiteList(ms.collectionDeleteHandler)))
+	r.HandleFunc("/vol/lookup", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeLookupHandler)))
+	r.HandleFunc("/vol/grow", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeGrowHandler)))
+	r.HandleFunc("/vol/status", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeStatusHandler)))
+	r.HandleFunc("/vol/vacuum", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeVacuumHandler)))
+	r.HandleFunc("/submit", ms.guard.WhiteList(ms.submitFromMasterServerHandler))
+	r.HandleFunc("/delete", ms.guard.WhiteList(ms.deleteFromMasterServerHandler))
 	r.HandleFunc("/{fileId}", ms.redirectHandler)
-	r.HandleFunc("/stats/counter", guard.Secure(statsCounterHandler))
-	r.HandleFunc("/stats/memory", guard.Secure(statsMemoryHandler))
+	r.HandleFunc("/stats/counter", ms.guard.WhiteList(statsCounterHandler))
+	r.HandleFunc("/stats/memory", ms.guard.WhiteList(statsMemoryHandler))
 
 	ms.Topo.StartRefreshWritableVolumes(garbageThreshold)
 
diff --git a/go/weed/weed_server/master_server_handlers_admin.go b/go/weed/weed_server/master_server_handlers_admin.go
index 33e45afd2..9d9880a6a 100644
--- a/go/weed/weed_server/master_server_handlers_admin.go
+++ b/go/weed/weed_server/master_server_handlers_admin.go
@@ -58,7 +58,10 @@ func (ms *MasterServer) dirJoinHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	ms.Topo.ProcessJoinMessage(joinMessage)
-	writeJsonQuiet(w, r, http.StatusOK, operation.JoinResult{VolumeSizeLimit: uint64(ms.volumeSizeLimitMB) * 1024 * 1024})
+	writeJsonQuiet(w, r, http.StatusOK, operation.JoinResult{
+		VolumeSizeLimit: uint64(ms.volumeSizeLimitMB) * 1024 * 1024,
+		SecretKey:       string(ms.guard.SecretKey),
+	})
 }
 
 func (ms *MasterServer) dirStatusHandler(w http.ResponseWriter, r *http.Request) {
diff --git a/go/weed/weed_server/volume_server.go b/go/weed/weed_server/volume_server.go
index 5613ec38c..177514920 100644
--- a/go/weed/weed_server/volume_server.go
+++ b/go/weed/weed_server/volume_server.go
@@ -41,16 +41,16 @@ func NewVolumeServer(publicMux, adminMux *http.ServeMux, ip string,
 
 	vs.guard = security.NewGuard(whiteList, "")
 
-	adminMux.HandleFunc("/status", vs.guard.Secure(vs.statusHandler))
-	adminMux.HandleFunc("/admin/assign_volume", vs.guard.Secure(vs.assignVolumeHandler))
-	adminMux.HandleFunc("/admin/vacuum_volume_check", vs.guard.Secure(vs.vacuumVolumeCheckHandler))
-	adminMux.HandleFunc("/admin/vacuum_volume_compact", vs.guard.Secure(vs.vacuumVolumeCompactHandler))
-	adminMux.HandleFunc("/admin/vacuum_volume_commit", vs.guard.Secure(vs.vacuumVolumeCommitHandler))
-	adminMux.HandleFunc("/admin/freeze_volume", vs.guard.Secure(vs.freezeVolumeHandler))
-	adminMux.HandleFunc("/admin/delete_collection", vs.guard.Secure(vs.deleteCollectionHandler))
-	adminMux.HandleFunc("/stats/counter", vs.guard.Secure(statsCounterHandler))
-	adminMux.HandleFunc("/stats/memory", vs.guard.Secure(statsMemoryHandler))
-	adminMux.HandleFunc("/stats/disk", vs.guard.Secure(vs.statsDiskHandler))
+	adminMux.HandleFunc("/status", vs.guard.WhiteList(vs.statusHandler))
+	adminMux.HandleFunc("/admin/assign_volume", vs.guard.WhiteList(vs.assignVolumeHandler))
+	adminMux.HandleFunc("/admin/vacuum_volume_check", vs.guard.WhiteList(vs.vacuumVolumeCheckHandler))
+	adminMux.HandleFunc("/admin/vacuum_volume_compact", vs.guard.WhiteList(vs.vacuumVolumeCompactHandler))
+	adminMux.HandleFunc("/admin/vacuum_volume_commit", vs.guard.WhiteList(vs.vacuumVolumeCommitHandler))
+	adminMux.HandleFunc("/admin/freeze_volume", vs.guard.WhiteList(vs.freezeVolumeHandler))
+	adminMux.HandleFunc("/admin/delete_collection", vs.guard.WhiteList(vs.deleteCollectionHandler))
+	adminMux.HandleFunc("/stats/counter", vs.guard.WhiteList(statsCounterHandler))
+	adminMux.HandleFunc("/stats/memory", vs.guard.WhiteList(statsMemoryHandler))
+	adminMux.HandleFunc("/stats/disk", vs.guard.WhiteList(vs.statsDiskHandler))
 	publicMux.HandleFunc("/delete", vs.guard.Secure(vs.batchDeleteHandler))
 	publicMux.HandleFunc("/", vs.storeHandler)
 
@@ -61,12 +61,13 @@ func NewVolumeServer(publicMux, adminMux *http.ServeMux, ip string,
 		vs.store.SetDataCenter(vs.dataCenter)
 		vs.store.SetRack(vs.rack)
 		for {
-			master, err := vs.store.Join()
+			master, secretKey, err := vs.store.Join()
 			if err == nil {
 				if !connected {
 					connected = true
 					vs.SetMasterNode(master)
-					glog.V(0).Infoln("Volume Server Connected with master at", master, "and set it as masterNode")
+					vs.guard.SecretKey = secretKey
+					glog.V(0).Infoln("Volume Server Connected with master at", master)
 				}
 			} else {
 				glog.V(4).Infoln("Volume Server Failed to talk with master:", err.Error())
@@ -102,3 +103,7 @@ func (vs *VolumeServer) Shutdown() {
 	vs.store.Close()
 	glog.V(0).Infoln("Shut down successfully!")
 }
+
+func (vs *VolumeServer) jwt(fileId string) security.EncodedJwt {
+	return security.GenJwt(vs.guard.SecretKey, fileId)
+}
diff --git a/go/weed/weed_server/volume_server_handlers.go b/go/weed/weed_server/volume_server_handlers.go
index 766d3e796..d3fdf0cb2 100644
--- a/go/weed/weed_server/volume_server_handlers.go
+++ b/go/weed/weed_server/volume_server_handlers.go
@@ -253,7 +253,8 @@ func (vs *VolumeServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	ret := operation.UploadResult{}
-	size, errorStatus := topology.ReplicatedWrite(vs.GetMasterNode(), vs.store, volumeId, needle, r)
+	size, errorStatus := topology.ReplicatedWrite(vs.GetMasterNode(),
+		vs.store, volumeId, needle, r)
 	httpStatus := http.StatusCreated
 	if errorStatus != "" {
 		httpStatus = http.StatusInternalServerError