diff --git a/auth/simple_token.go b/auth/simple_token.go
index ac55ad7f1..ba0413101 100644
--- a/auth/simple_token.go
+++ b/auth/simple_token.go
@@ -35,7 +35,7 @@ const (
 
 // var for testing purposes
 var (
-	simpleTokenTTL           = 5 * time.Minute
+	simpleTokenTTLDefault    = 300 * time.Second
 	simpleTokenTTLResolution = 1 * time.Second
 )
 
@@ -45,6 +45,7 @@ type simpleTokenTTLKeeper struct {
 	stopc           chan struct{}
 	deleteTokenFunc func(string)
 	mu              *sync.Mutex
+	simpleTokenTTL  time.Duration
 }
 
 func (tm *simpleTokenTTLKeeper) stop() {
@@ -56,12 +57,12 @@ func (tm *simpleTokenTTLKeeper) stop() {
 }
 
 func (tm *simpleTokenTTLKeeper) addSimpleToken(token string) {
-	tm.tokens[token] = time.Now().Add(simpleTokenTTL)
+	tm.tokens[token] = time.Now().Add(tm.simpleTokenTTL)
 }
 
 func (tm *simpleTokenTTLKeeper) resetSimpleToken(token string) {
 	if _, ok := tm.tokens[token]; ok {
-		tm.tokens[token] = time.Now().Add(simpleTokenTTL)
+		tm.tokens[token] = time.Now().Add(tm.simpleTokenTTL)
 	}
 }
 
@@ -98,6 +99,7 @@ type tokenSimple struct {
 	simpleTokenKeeper *simpleTokenTTLKeeper
 	simpleTokensMu    sync.Mutex
 	simpleTokens      map[string]string // token -> username
+	simpleTokenTTL    time.Duration
 }
 
 func (t *tokenSimple) genTokenPrefix() (string, error) {
@@ -146,6 +148,10 @@ func (t *tokenSimple) invalidateUser(username string) {
 }
 
 func (t *tokenSimple) enable() {
+	if t.simpleTokenTTL <= 0 {
+		t.simpleTokenTTL = simpleTokenTTLDefault
+	}
+
 	delf := func(tk string) {
 		if username, ok := t.simpleTokens[tk]; ok {
 			plog.Infof("deleting token %s for user %s", tk, username)
@@ -158,6 +164,7 @@ func (t *tokenSimple) enable() {
 		stopc:           make(chan struct{}),
 		deleteTokenFunc: delf,
 		mu:              &t.simpleTokensMu,
+		simpleTokenTTL:  t.simpleTokenTTL,
 	}
 	go t.simpleTokenKeeper.run()
 }
@@ -215,9 +222,10 @@ func (t *tokenSimple) isValidSimpleToken(ctx context.Context, token string) bool
 	return false
 }
 
-func newTokenProviderSimple(indexWaiter func(uint64) <-chan struct{}) *tokenSimple {
+func newTokenProviderSimple(indexWaiter func(uint64) <-chan struct{}, TokenTTL time.Duration) *tokenSimple {
 	return &tokenSimple{
-		simpleTokens: make(map[string]string),
-		indexWaiter:  indexWaiter,
+		simpleTokens:   make(map[string]string),
+		indexWaiter:    indexWaiter,
+		simpleTokenTTL: TokenTTL,
 	}
 }
diff --git a/auth/simple_token_test.go b/auth/simple_token_test.go
index 1890521d4..c1bdab5d3 100644
--- a/auth/simple_token_test.go
+++ b/auth/simple_token_test.go
@@ -22,9 +22,9 @@ import (
 // TestSimpleTokenDisabled ensures that TokenProviderSimple behaves correctly when
 // disabled.
 func TestSimpleTokenDisabled(t *testing.T) {
-	initialState := newTokenProviderSimple(dummyIndexWaiter)
+	initialState := newTokenProviderSimple(dummyIndexWaiter, simpleTokenTTLDefault)
 
-	explicitlyDisabled := newTokenProviderSimple(dummyIndexWaiter)
+	explicitlyDisabled := newTokenProviderSimple(dummyIndexWaiter, simpleTokenTTLDefault)
 	explicitlyDisabled.enable()
 	explicitlyDisabled.disable()
 
@@ -46,7 +46,7 @@ func TestSimpleTokenDisabled(t *testing.T) {
 // TestSimpleTokenAssign ensures that TokenProviderSimple can correctly assign a
 // token, look it up with info, and invalidate it by user.
 func TestSimpleTokenAssign(t *testing.T) {
-	tp := newTokenProviderSimple(dummyIndexWaiter)
+	tp := newTokenProviderSimple(dummyIndexWaiter, simpleTokenTTLDefault)
 	tp.enable()
 	ctx := context.WithValue(context.WithValue(context.TODO(), AuthenticateParamIndex{}, uint64(1)), AuthenticateParamSimpleTokenPrefix{}, "dummy")
 	token, err := tp.assign(ctx, "user1", 0)
diff --git a/auth/store.go b/auth/store.go
index 2c40af467..2877bb8cd 100644
--- a/auth/store.go
+++ b/auth/store.go
@@ -23,6 +23,7 @@ import (
 	"strings"
 	"sync"
 	"sync/atomic"
+	"time"
 
 	"github.com/coreos/etcd/auth/authpb"
 	pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
@@ -1087,7 +1088,11 @@ func decomposeOpts(optstr string) (string, map[string]string, error) {
 
 }
 
-func NewTokenProvider(tokenOpts string, indexWaiter func(uint64) <-chan struct{}) (TokenProvider, error) {
+// NewTokenProvider creates a new token provider.
+func NewTokenProvider(
+	tokenOpts string,
+	indexWaiter func(uint64) <-chan struct{},
+	TokenTTL time.Duration) (TokenProvider, error) {
 	tokenType, typeSpecificOpts, err := decomposeOpts(tokenOpts)
 	if err != nil {
 		return nil, ErrInvalidAuthOpts
@@ -1096,7 +1101,7 @@ func NewTokenProvider(tokenOpts string, indexWaiter func(uint64) <-chan struct{}
 	switch tokenType {
 	case tokenTypeSimple:
 		plog.Warningf("simple token is not cryptographically signed")
-		return newTokenProviderSimple(indexWaiter), nil
+		return newTokenProviderSimple(indexWaiter, TokenTTL), nil
 
 	case tokenTypeJWT:
 		return newTokenProviderJWT(typeSpecificOpts)
diff --git a/auth/store_test.go b/auth/store_test.go
index a60ff4f3e..b447a2c2f 100644
--- a/auth/store_test.go
+++ b/auth/store_test.go
@@ -17,6 +17,7 @@ package auth
 import (
 	"context"
 	"fmt"
+	"go.uber.org/zap"
 	"os"
 	"reflect"
 	"strings"
@@ -48,7 +49,7 @@ func TestNewAuthStoreRevision(t *testing.T) {
 	b, tPath := backend.NewDefaultTmpBackend()
 	defer os.Remove(tPath)
 
-	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter)
+	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter, simpleTokenTTLDefault)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -73,10 +74,32 @@ func TestNewAuthStoreRevision(t *testing.T) {
 	}
 }
 
+// TestNewAuthStoreBryptCost ensures that NewAuthStore uses default when given bcrypt-cost is invalid
+func TestNewAuthStoreBcryptCost(t *testing.T) {
+	b, tPath := backend.NewDefaultTmpBackend()
+	defer os.Remove(tPath)
+
+	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter, simpleTokenTTLDefault)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	invalidCosts := [2]int{bcrypt.MinCost - 1, bcrypt.MaxCost + 1}
+	for _, invalidCost := range invalidCosts {
+		as := NewAuthStore(b, nil, tp, invalidCost)
+		if as.BcryptCost() != bcrypt.DefaultCost {
+			t.Fatalf("expected DefaultCost when bcryptcost is invalid")
+		}
+		as.Close()
+	}
+
+	b.Close()
+}
+
 func setupAuthStore(t *testing.T) (store *authStore, teardownfunc func(t *testing.T)) {
 	b, tPath := backend.NewDefaultTmpBackend()
 
-	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter)
+	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter, simpleTokenTTLDefault)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -513,7 +536,7 @@ func TestAuthInfoFromCtxRace(t *testing.T) {
 	b, tPath := backend.NewDefaultTmpBackend()
 	defer os.Remove(tPath)
 
-	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter)
+	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter, simpleTokenTTLDefault)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -585,7 +608,11 @@ func TestRecoverFromSnapshot(t *testing.T) {
 
 	as.Close()
 
+<<<<<<< HEAD
 	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter)
+=======
+	tp, err := NewTokenProvider(zap.NewExample(), tokenTypeSimple, dummyIndexWaiter, simpleTokenTTLDefault)
+>>>>>>> auth: Customize simpleTokenTTL settings.
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -618,13 +645,13 @@ func contains(array []string, str string) bool {
 
 func TestHammerSimpleAuthenticate(t *testing.T) {
 	// set TTL values low to try to trigger races
-	oldTTL, oldTTLRes := simpleTokenTTL, simpleTokenTTLResolution
+	oldTTL, oldTTLRes := simpleTokenTTLDefault, simpleTokenTTLResolution
 	defer func() {
-		simpleTokenTTL = oldTTL
+		simpleTokenTTLDefault = oldTTL
 		simpleTokenTTLResolution = oldTTLRes
 	}()
-	simpleTokenTTL = 10 * time.Millisecond
-	simpleTokenTTLResolution = simpleTokenTTL
+	simpleTokenTTLDefault = 10 * time.Millisecond
+	simpleTokenTTLResolution = simpleTokenTTLDefault
 	users := make(map[string]struct{})
 
 	as, tearDown := setupAuthStore(t)
@@ -667,7 +694,7 @@ func TestRolesOrder(t *testing.T) {
 	b, tPath := backend.NewDefaultTmpBackend()
 	defer os.Remove(tPath)
 
-	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter)
+	tp, err := NewTokenProvider(tokenTypeSimple, dummyIndexWaiter, simpleTokenTTLDefault)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -722,7 +749,7 @@ func testAuthInfoFromCtxWithRoot(t *testing.T, opts string) {
 	b, tPath := backend.NewDefaultTmpBackend()
 	defer os.Remove(tPath)
 
-	tp, err := NewTokenProvider(opts, dummyIndexWaiter)
+	tp, err := NewTokenProvider(opts, dummyIndexWaiter, simpleTokenTTLDefault)
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/embed/config.go b/embed/config.go
index a48de2948..473e757c6 100644
--- a/embed/config.go
+++ b/embed/config.go
@@ -222,6 +222,9 @@ type Config struct {
 
 	// Experimental flags
 
+	//The AuthTokenTTL in seconds of the simple token
+	AuthTokenTTL uint `json:"auth-token-ttl"`
+
 	ExperimentalInitialCorruptCheck bool          `json:"experimental-initial-corrupt-check"`
 	ExperimentalCorruptCheckTime    time.Duration `json:"experimental-corrupt-check-time"`
 	ExperimentalEnableV2V3          string        `json:"experimental-enable-v2v3"`
@@ -284,6 +287,7 @@ func NewConfig() *Config {
 		Metrics:                    "basic",
 		EnableV2:                   DefaultEnableV2,
 		AuthToken:                  "simple",
+		AuthTokenTTL: 300,
 	}
 	cfg.InitialCluster = cfg.InitialClusterFromName(cfg.Name)
 	return cfg
diff --git a/embed/etcd.go b/embed/etcd.go
index b0f81063b..d656e179c 100644
--- a/embed/etcd.go
+++ b/embed/etcd.go
@@ -171,6 +171,7 @@ func StartEtcd(inCfg *Config) (e *Etcd, err error) {
 		StrictReconfigCheck:        cfg.StrictReconfigCheck,
 		ClientCertAuthEnabled:      cfg.ClientTLSInfo.ClientCertAuth,
 		AuthToken:                  cfg.AuthToken,
+		TokenTTL:                   cfg.AuthTokenTTL,
 		InitialCorruptCheck:        cfg.ExperimentalInitialCorruptCheck,
 		CorruptCheckTime:           cfg.ExperimentalCorruptCheckTime,
 		Debug:                      cfg.Debug,
diff --git a/etcdmain/config.go b/etcdmain/config.go
index 3ccd24e3e..5ae85778b 100644
--- a/etcdmain/config.go
+++ b/etcdmain/config.go
@@ -215,6 +215,7 @@ func newConfig() *config {
 
 	// auth
 	fs.StringVar(&cfg.ec.AuthToken, "auth-token", cfg.ec.AuthToken, "Specify auth token specific options.")
+	fs.UintVar(&cfg.ec.AuthTokenTTL, "auth-token-ttl", cfg.ec.AuthTokenTTL, "The lifetime in seconds of the auth token.")
 
 	// experimental
 	fs.BoolVar(&cfg.ec.ExperimentalInitialCorruptCheck, "experimental-initial-corrupt-check", cfg.ec.ExperimentalInitialCorruptCheck, "Enable to check data corruption before serving any client/peer traffic.")
diff --git a/etcdmain/help.go b/etcdmain/help.go
index 04c8ec8d1..784f20815 100644
--- a/etcdmain/help.go
+++ b/etcdmain/help.go
@@ -193,6 +193,8 @@ profiling flags:
 auth flags:
 	--auth-token 'simple'
 		Specify a v3 authentication token type and its options ('simple' or 'jwt').
+	--auth-token-ttl 300
+    Time (in seconds) of the auth-token-ttl.
 
 experimental flags:
 	--experimental-initial-corrupt-check 'false'
diff --git a/etcdserver/config.go b/etcdserver/config.go
index 295d95299..78b74bfa5 100644
--- a/etcdserver/config.go
+++ b/etcdserver/config.go
@@ -95,6 +95,7 @@ type ServerConfig struct {
 	ClientCertAuthEnabled bool
 
 	AuthToken string
+	TokenTTL   uint
 
 	// InitialCorruptCheck is true to check data corruption on boot
 	// before serving any peer/client traffic.
diff --git a/etcdserver/server.go b/etcdserver/server.go
index 4fedb2007..281c84b16 100644
--- a/etcdserver/server.go
+++ b/etcdserver/server.go
@@ -461,6 +461,7 @@ func NewServer(cfg ServerConfig) (srv *EtcdServer, err error) {
 		func(index uint64) <-chan struct{} {
 			return srv.applyWait.Wait(index)
 		},
+		time.Duration(cfg.TokenTTL)*time.Second,
 	)
 	if err != nil {
 		plog.Warningf("failed to create token provider,err is %v", err)