diff --git a/glide.yaml b/glide.yaml
index c7b8e74..c0db753 100644
--- a/glide.yaml
+++ b/glide.yaml
@@ -9,3 +9,5 @@ import:
 - package: git.loafle.net/overflow/gateway
 - package: git.loafle.net/commons/di-go
 - package: git.loafle.net/overflow/commons-go
+- package: github.com/dgrijalva/jwt-go
+  version: ^3.2.0
diff --git a/service/member-service.go b/service/member-service.go
index a3320ba..49cffa1 100644
--- a/service/member-service.go
+++ b/service/member-service.go
@@ -2,38 +2,142 @@ package service
 
 import (
 	"context"
+	"crypto/rsa"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
 	"reflect"
+	"time"
 
 	cda "git.loafle.net/commons/di-go/annotation"
 	cdr "git.loafle.net/commons/di-go/registry"
+	logging "git.loafle.net/commons/logging-go"
 	"git.loafle.net/commons/server-go"
 	_ "git.loafle.net/overflow/commons-go/annotation"
 	"git.loafle.net/overflow/gateway/external/grpc"
 	"github.com/valyala/fasthttp"
+
+	jwt "github.com/dgrijalva/jwt-go"
+)
+
+var (
+	verifyKey *rsa.PublicKey
+	signKey   *rsa.PrivateKey
 )
 
 var MemberServiceType = reflect.TypeOf((*MemberService)(nil))
 
 func init() {
 	cdr.RegisterType(MemberServiceType)
+
+	signBytes, err := ioutil.ReadFile("overFlow-private.key")
+	if nil != err {
+		panic(err)
+	}
+
+	signKey, err = jwt.ParseRSAPrivateKeyFromPEM(signBytes)
+	if nil != err {
+		panic(err)
+	}
+
+	verifyBytes, err := ioutil.ReadFile("overFlow-public.pem")
+	if nil != err {
+		panic(err)
+	}
+
+	verifyKey, err = jwt.ParseRSAPublicKeyFromPEM(verifyBytes)
+	if nil != err {
+		panic(err)
+	}
 }
 
 type MemberService struct {
 	cda.TypeAnnotation `annotation:"@overflow:Service()"`
 }
 
-func (ms *MemberService) Signin(servletCtx server.ServletCtx, ctx *fasthttp.RequestCtx, id string, pw string) (string, error) {
+func (ms *MemberService) Signin(servletCtx server.ServletCtx, ctx *fasthttp.RequestCtx, signinID string, signinPW string) (string, error) {
 
 	gRPCCtx := context.Background()
-	r, err := grpc.Exec(gRPCCtx, "MemberService.signin", id, pw)
+	r, err := grpc.Exec(gRPCCtx, "MemberService.signin", signinID, signinPW)
 	if nil != err {
 		return "", err
 	}
 
-	return r, nil
+	token := jwt.New(jwt.SigningMethodRS512)
+
+	/* Create a map to store our claims */
+	claims := token.Claims.(jwt.MapClaims)
+
+	// expireTime := time.Now().Add(time.Hour * 24)
+
+	/* Set token claims */
+	claims["iss"] = "overFlow"
+	claims["iat"] = time.Now().Unix()
+	claims["exp"] = time.Now().Add(time.Hour * 24).Unix()
+	claims["aud"] = "www.overflow.cloud"
+	claims["sub"] = signinID
+
+	/* Sign the token with our secret */
+	tokenString, err := token.SignedString(signKey)
+	if nil != err {
+		return "", err
+	}
+
+	var domainMember interface{}
+	err = json.Unmarshal([]byte(r), &domainMember)
+	if nil != err {
+		return "", err
+	}
+
+	signInResult := &SignInResult{
+		AuthToken:    tokenString,
+		DomainMember: domainMember,
+	}
+
+	buf, err := json.Marshal(signInResult)
+	if nil != err {
+		return "", err
+	}
+
+	return string(buf), nil
+}
+
+func (ms *MemberService) SigninByCookie(servletCtx server.ServletCtx, ctx *fasthttp.RequestCtx, authToken string) (string, error) {
+
+	token, err := jwt.Parse(authToken, func(token *jwt.Token) (interface{}, error) {
+		// Don't forget to validate the alg is what you expect:
+		if _, ok := token.Method.(*jwt.SigningMethodRSA); !ok {
+			return nil, fmt.Errorf("Webapp: Unexpected signing method: %v", token.Header["alg"])
+		}
+
+		// hmacSampleSecret is a []byte containing your secret, e.g. []byte("my_secret_key")
+		return verifyKey, nil
+	})
+	if nil != err {
+		return "", err
+	}
+
+	var ok bool
+	var claims jwt.MapClaims
+	if claims, ok = token.Claims.(jwt.MapClaims); !ok || !token.Valid {
+		logging.Logger().Warnf("Token is not valid %v", token)
+		return "", fmt.Errorf("authToken is not valid")
+	}
+
+	params := []string{claims["sub"].(string)}
+
+	gRPCCtx := context.Background()
+	r, err := grpc.Exec(gRPCCtx, "DomainMemberService.readByMemberEmail", params...)
+
+	return r, err
 }
 
 func (ms *MemberService) Register(servletCtx server.ServletCtx, ctx *fasthttp.RequestCtx, id string, pw string) (string, error) {
 
 	return "dkfksddfk", nil
 }
+
+type SignInResult struct {
+	AuthToken    string      `json:"authToken"`
+	DomainMember interface{} `json:"domainMember"`
+}