diff --git a/pkg/privacy/password.go b/pkg/privacy/password.go
index b3c1fd5..5c7936d 100644
--- a/pkg/privacy/password.go
+++ b/pkg/privacy/password.go
@@ -21,7 +21,6 @@
 	"strings"
 
 	scrypt "github.com/elithrar/simple-scrypt"
-	"github.com/go-chassis/foundation/stringutil"
 	"golang.org/x/crypto/bcrypt"
 
 	"github.com/apache/servicecomb-service-center/pkg/log"
@@ -33,23 +32,26 @@
 
 var ScryptParams = scrypt.Params{N: 1024, R: 8, P: 1, SaltLen: 8, DKLen: 32}
 
-// HashPassword
-// Deprecated: use ScryptPassword, this is only for unit test to test compatible with old version
-func HashPassword(pwd string) (string, error) {
-	hash, err := bcrypt.GenerateFromPassword([]byte(pwd), 14)
-	if err != nil {
-		return "", err
-	}
-	return stringutil.Bytes2str(hash), nil
+// DefaultManager default manager
+var DefaultManager PasswordManager = &passwordManager{}
+
+type PasswordManager interface {
+	EncryptPassword(pwd string) (string, error)
+	CheckPassword(hashedPwd, pwd string) bool
 }
-func ScryptPassword(pwd string) (string, error) {
+
+type passwordManager struct {
+}
+
+func (p *passwordManager) EncryptPassword(pwd string) (string, error) {
 	hash, err := scrypt.GenerateFromPassword([]byte(pwd), ScryptParams)
 	if err != nil {
 		return "", err
 	}
 	return string(hash), nil
 }
-func SamePassword(hashedPwd, pwd string) bool {
+
+func (p *passwordManager) CheckPassword(hashedPwd, pwd string) bool {
 	if strings.HasPrefix(hashedPwd, algBcrypt) {
 		err := bcrypt.CompareHashAndPassword([]byte(hashedPwd), []byte(pwd))
 		if err == bcrypt.ErrMismatchedHashAndPassword {
@@ -62,5 +64,11 @@
 		log.Warn("incorrect password attempts")
 	}
 	return err == nil
+}
 
+func ScryptPassword(pwd string) (string, error) {
+	return DefaultManager.EncryptPassword(pwd)
+}
+func SamePassword(hashedPwd, pwd string) bool {
+	return DefaultManager.CheckPassword(hashedPwd, pwd)
 }
diff --git a/pkg/privacy/password_test.go b/pkg/privacy/password_test.go
index c1e0fa2..e2a3251 100644
--- a/pkg/privacy/password_test.go
+++ b/pkg/privacy/password_test.go
@@ -23,42 +23,21 @@
 
 	"github.com/apache/servicecomb-service-center/pkg/privacy"
 	scrypt "github.com/elithrar/simple-scrypt"
-	"github.com/go-chassis/foundation/stringutil"
 	"github.com/stretchr/testify/assert"
 	"golang.org/x/crypto/pbkdf2"
 )
 
-func TestHashPassword(t *testing.T) {
-	h, _ := privacy.HashPassword("test")
-	t.Log(h)
-	mac, _ := privacy.ScryptPassword("test")
-	t.Log(mac)
-
-	t.Run("given old hash result, should be compatible", func(t *testing.T) {
-		same := privacy.SamePassword(h, "test")
-		assert.True(t, same)
-	})
-
-	sameMac := privacy.SamePassword(mac, "test")
-	assert.True(t, sameMac)
-
-	t.Run("use different params for scrypt, should be compatible", func(t *testing.T) {
-		h2, _ := scrypt.GenerateFromPassword([]byte("test"), scrypt.Params{N: 1024, R: 8, P: 1, SaltLen: 8, DKLen: 32})
-		same := privacy.SamePassword(stringutil.Bytes2str(h2), "test")
-		assert.True(t, same)
-	})
+type mockPassword struct {
 }
-func BenchmarkBcrypt(b *testing.B) {
-	h, _ := privacy.HashPassword("test")
-	for i := 0; i < b.N; i++ {
-		same := privacy.SamePassword(h, "test")
-		if !same {
-			panic("")
-		}
 
-	}
-	b.ReportAllocs()
+func (m mockPassword) EncryptPassword(pwd string) (string, error) {
+	return "encrypt password", nil
 }
+
+func (m mockPassword) CheckPassword(hashedPwd, pwd string) bool {
+	return true
+}
+
 func BenchmarkScrypt(b *testing.B) {
 	h, _ := privacy.ScryptPassword("test")
 	for i := 0; i < b.N; i++ {
@@ -117,3 +96,14 @@
 	})
 	b.ReportAllocs()
 }
+func TestDefaultManager(t *testing.T) {
+	currentManager := privacy.DefaultManager
+	privacy.DefaultManager = &mockPassword{}
+	defer func() {
+		privacy.DefaultManager = currentManager
+	}()
+	password, _ := privacy.DefaultManager.EncryptPassword("")
+	assert.Equal(t, "encrypt password", password)
+	samePassword := privacy.DefaultManager.CheckPassword("", "")
+	assert.True(t, samePassword)
+}