diff --git a/oauthproxy.go b/oauthproxy.go
index 389b2a9..62d1a18 100644
--- a/oauthproxy.go
+++ b/oauthproxy.go
@@ -14,9 +14,9 @@ import (
 	"time"
 
 	"github.com/mbland/hmacauth"
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/logger"
 	sessionsapi "github.com/pusher/oauth2_proxy/pkg/apis/sessions"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 	"github.com/pusher/oauth2_proxy/providers"
 	"github.com/yhat/wsutil"
 )
@@ -555,7 +555,7 @@ func (p *OAuthProxy) SignOut(rw http.ResponseWriter, req *http.Request) {
 
 // OAuthStart starts the OAuth2 authentication flow
 func (p *OAuthProxy) OAuthStart(rw http.ResponseWriter, req *http.Request) {
-	nonce, err := cookie.Nonce()
+	nonce, err := encryption.Nonce()
 	if err != nil {
 		logger.Printf("Error obtaining nonce: %s", err.Error())
 		p.ErrorPage(rw, 500, "Internal Error", err.Error())
diff --git a/options.go b/options.go
index 0460bce..2b506e3 100644
--- a/options.go
+++ b/options.go
@@ -17,10 +17,10 @@ import (
 	oidc "github.com/coreos/go-oidc"
 	"github.com/dgrijalva/jwt-go"
 	"github.com/mbland/hmacauth"
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/logger"
 	"github.com/pusher/oauth2_proxy/pkg/apis/options"
 	sessionsapi "github.com/pusher/oauth2_proxy/pkg/apis/sessions"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 	"github.com/pusher/oauth2_proxy/pkg/sessions"
 	"github.com/pusher/oauth2_proxy/providers"
 	"gopkg.in/natefinch/lumberjack.v2"
@@ -268,7 +268,7 @@ func (o *Options) Validate() error {
 	}
 	msgs = parseProviderInfo(o, msgs)
 
-	var cipher *cookie.Cipher
+	var cipher *encryption.Cipher
 	if o.PassAccessToken || o.SetAuthorization || o.PassAuthorization || (o.CookieRefresh != time.Duration(0)) {
 		validCookieSecretSize := false
 		for _, i := range []int{16, 24, 32} {
@@ -293,7 +293,7 @@ func (o *Options) Validate() error {
 				len(secretBytes(o.CookieSecret)), suffix))
 		} else {
 			var err error
-			cipher, err = cookie.NewCipher(secretBytes(o.CookieSecret))
+			cipher, err = encryption.NewCipher(secretBytes(o.CookieSecret))
 			if err != nil {
 				msgs = append(msgs, fmt.Sprintf("cookie-secret error: %v", err))
 			}
diff --git a/pkg/apis/options/sessions.go b/pkg/apis/options/sessions.go
index c72da3d..c96d490 100644
--- a/pkg/apis/options/sessions.go
+++ b/pkg/apis/options/sessions.go
@@ -1,13 +1,11 @@
 package options
 
-import (
-	"github.com/pusher/oauth2_proxy/cookie"
-)
+import "github.com/pusher/oauth2_proxy/pkg/encryption"
 
 // SessionOptions contains configuration options for the SessionStore providers.
 type SessionOptions struct {
 	Type   string `flag:"session-store-type" cfg:"session_store_type" env:"OAUTH2_PROXY_SESSION_STORE_TYPE"`
-	Cipher *cookie.Cipher
+	Cipher *encryption.Cipher
 	CookieStoreOptions
 	RedisStoreOptions
 }
diff --git a/pkg/apis/sessions/session_state.go b/pkg/apis/sessions/session_state.go
index 01789ff..84c0dc9 100644
--- a/pkg/apis/sessions/session_state.go
+++ b/pkg/apis/sessions/session_state.go
@@ -7,7 +7,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/pusher/oauth2_proxy/cookie"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 )
 
 // SessionState is used to store information about the currently authenticated user session
@@ -66,7 +66,7 @@ func (s *SessionState) String() string {
 }
 
 // EncodeSessionState returns string representation of the current session
-func (s *SessionState) EncodeSessionState(c *cookie.Cipher) (string, error) {
+func (s *SessionState) EncodeSessionState(c *encryption.Cipher) (string, error) {
 	var ss SessionState
 	if c == nil {
 		// Store only Email and User when cipher is unavailable
@@ -133,7 +133,7 @@ func legacyDecodeSessionStatePlain(v string) (*SessionState, error) {
 
 // legacyDecodeSessionState attempts to decode the session state string
 // generated by v3.1.0 or older
-func legacyDecodeSessionState(v string, c *cookie.Cipher) (*SessionState, error) {
+func legacyDecodeSessionState(v string, c *encryption.Cipher) (*SessionState, error) {
 	chunks := strings.Split(v, "|")
 
 	if c == nil {
@@ -176,7 +176,7 @@ func legacyDecodeSessionState(v string, c *cookie.Cipher) (*SessionState, error)
 }
 
 // DecodeSessionState decodes the session cookie string into a SessionState
-func DecodeSessionState(v string, c *cookie.Cipher) (*SessionState, error) {
+func DecodeSessionState(v string, c *encryption.Cipher) (*SessionState, error) {
 	var ssj SessionStateJSON
 	var ss *SessionState
 	err := json.Unmarshal([]byte(v), &ssj)
diff --git a/pkg/apis/sessions/session_state_test.go b/pkg/apis/sessions/session_state_test.go
index a48344e..c8ccff1 100644
--- a/pkg/apis/sessions/session_state_test.go
+++ b/pkg/apis/sessions/session_state_test.go
@@ -5,8 +5,8 @@ import (
 	"testing"
 	"time"
 
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/pkg/apis/sessions"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -14,9 +14,9 @@ const secret = "0123456789abcdefghijklmnopqrstuv"
 const altSecret = "0000000000abcdefghijklmnopqrstuv"
 
 func TestSessionStateSerialization(t *testing.T) {
-	c, err := cookie.NewCipher([]byte(secret))
+	c, err := encryption.NewCipher([]byte(secret))
 	assert.Equal(t, nil, err)
-	c2, err := cookie.NewCipher([]byte(altSecret))
+	c2, err := encryption.NewCipher([]byte(altSecret))
 	assert.Equal(t, nil, err)
 	s := &sessions.SessionState{
 		Email:        "user@domain.com",
@@ -54,9 +54,9 @@ func TestSessionStateSerialization(t *testing.T) {
 }
 
 func TestSessionStateSerializationWithUser(t *testing.T) {
-	c, err := cookie.NewCipher([]byte(secret))
+	c, err := encryption.NewCipher([]byte(secret))
 	assert.Equal(t, nil, err)
-	c2, err := cookie.NewCipher([]byte(altSecret))
+	c2, err := encryption.NewCipher([]byte(altSecret))
 	assert.Equal(t, nil, err)
 	s := &sessions.SessionState{
 		User:         "just-user",
@@ -146,7 +146,7 @@ func TestExpired(t *testing.T) {
 type testCase struct {
 	sessions.SessionState
 	Encoded string
-	Cipher  *cookie.Cipher
+	Cipher  *encryption.Cipher
 	Error   bool
 }
 
@@ -203,7 +203,7 @@ func TestDecodeSessionState(t *testing.T) {
 	eString := string(eJSON)
 	eUnix := e.Unix()
 
-	c, err := cookie.NewCipher([]byte(secret))
+	c, err := encryption.NewCipher([]byte(secret))
 	assert.NoError(t, err)
 
 	testCases := []testCase{
diff --git a/cookie/cookies.go b/pkg/encryption/cipher.go
similarity index 99%
rename from cookie/cookies.go
rename to pkg/encryption/cipher.go
index 0d354e1..c308330 100644
--- a/cookie/cookies.go
+++ b/pkg/encryption/cipher.go
@@ -1,4 +1,4 @@
-package cookie
+package encryption
 
 import (
 	"crypto/aes"
diff --git a/cookie/cookies_test.go b/pkg/encryption/cipher_test.go
similarity index 98%
rename from cookie/cookies_test.go
rename to pkg/encryption/cipher_test.go
index 500550e..fb6a4aa 100644
--- a/cookie/cookies_test.go
+++ b/pkg/encryption/cipher_test.go
@@ -1,4 +1,4 @@
-package cookie
+package encryption
 
 import (
 	"encoding/base64"
diff --git a/cookie/nonce.go b/pkg/encryption/nonce.go
similarity index 93%
rename from cookie/nonce.go
rename to pkg/encryption/nonce.go
index 6def148..69850c4 100644
--- a/cookie/nonce.go
+++ b/pkg/encryption/nonce.go
@@ -1,4 +1,4 @@
-package cookie
+package encryption
 
 import (
 	"crypto/rand"
diff --git a/pkg/sessions/cookie/session_store.go b/pkg/sessions/cookie/session_store.go
index c40dd23..960be90 100644
--- a/pkg/sessions/cookie/session_store.go
+++ b/pkg/sessions/cookie/session_store.go
@@ -8,10 +8,10 @@ import (
 	"strings"
 	"time"
 
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/pkg/apis/options"
 	"github.com/pusher/oauth2_proxy/pkg/apis/sessions"
 	"github.com/pusher/oauth2_proxy/pkg/cookies"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 	"github.com/pusher/oauth2_proxy/pkg/sessions/utils"
 )
 
@@ -28,7 +28,7 @@ var _ sessions.SessionStore = &SessionStore{}
 // interface that stores sessions in client side cookies
 type SessionStore struct {
 	CookieOptions *options.CookieOptions
-	CookieCipher  *cookie.Cipher
+	CookieCipher  *encryption.Cipher
 }
 
 // Save takes a sessions.SessionState and stores the information from it
@@ -53,7 +53,7 @@ func (s *SessionStore) Load(req *http.Request) (*sessions.SessionState, error) {
 		// always http.ErrNoCookie
 		return nil, fmt.Errorf("Cookie %q not present", s.CookieOptions.CookieName)
 	}
-	val, _, ok := cookie.Validate(c, s.CookieOptions.CookieSecret, s.CookieOptions.CookieExpire)
+	val, _, ok := encryption.Validate(c, s.CookieOptions.CookieSecret, s.CookieOptions.CookieExpire)
 	if !ok {
 		return nil, errors.New("Cookie Signature not valid")
 	}
@@ -96,7 +96,7 @@ func (s *SessionStore) setSessionCookie(rw http.ResponseWriter, req *http.Reques
 // authentication details
 func (s *SessionStore) makeSessionCookie(req *http.Request, value string, now time.Time) []*http.Cookie {
 	if value != "" {
-		value = cookie.SignedValue(s.CookieOptions.CookieSecret, s.CookieOptions.CookieName, value, now)
+		value = encryption.SignedValue(s.CookieOptions.CookieSecret, s.CookieOptions.CookieName, value, now)
 	}
 	c := s.makeCookie(req, s.CookieOptions.CookieName, value, s.CookieOptions.CookieExpire, now)
 	if len(c.Value) > 4096-len(s.CookieOptions.CookieName) {
diff --git a/pkg/sessions/redis/redis_store.go b/pkg/sessions/redis/redis_store.go
index 82e941e..ed33d72 100644
--- a/pkg/sessions/redis/redis_store.go
+++ b/pkg/sessions/redis/redis_store.go
@@ -13,10 +13,10 @@ import (
 	"time"
 
 	"github.com/go-redis/redis"
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/pkg/apis/options"
 	"github.com/pusher/oauth2_proxy/pkg/apis/sessions"
 	"github.com/pusher/oauth2_proxy/pkg/cookies"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 )
 
 // TicketData is a structure representing the ticket used in server session storage
@@ -28,7 +28,7 @@ type TicketData struct {
 // SessionStore is an implementation of the sessions.SessionStore
 // interface that stores sessions in redis
 type SessionStore struct {
-	CookieCipher  *cookie.Cipher
+	CookieCipher  *encryption.Cipher
 	CookieOptions *options.CookieOptions
 	Client        *redis.Client
 }
@@ -106,7 +106,7 @@ func (store *SessionStore) Load(req *http.Request) (*sessions.SessionState, erro
 		return nil, fmt.Errorf("error loading session: %s", err)
 	}
 
-	val, _, ok := cookie.Validate(requestCookie, store.CookieOptions.CookieSecret, store.CookieOptions.CookieExpire)
+	val, _, ok := encryption.Validate(requestCookie, store.CookieOptions.CookieSecret, store.CookieOptions.CookieExpire)
 	if !ok {
 		return nil, fmt.Errorf("Cookie Signature not valid")
 	}
@@ -166,7 +166,7 @@ func (store *SessionStore) Clear(rw http.ResponseWriter, req *http.Request) erro
 		return fmt.Errorf("error retrieving cookie: %v", err)
 	}
 
-	val, _, ok := cookie.Validate(requestCookie, store.CookieOptions.CookieSecret, store.CookieOptions.CookieExpire)
+	val, _, ok := encryption.Validate(requestCookie, store.CookieOptions.CookieSecret, store.CookieOptions.CookieExpire)
 	if !ok {
 		return fmt.Errorf("Cookie Signature not valid")
 	}
@@ -186,7 +186,7 @@ func (store *SessionStore) Clear(rw http.ResponseWriter, req *http.Request) erro
 // makeCookie makes a cookie, signing the value if present
 func (store *SessionStore) makeCookie(req *http.Request, value string, expires time.Duration, now time.Time) *http.Cookie {
 	if value != "" {
-		value = cookie.SignedValue(store.CookieOptions.CookieSecret, store.CookieOptions.CookieName, value, now)
+		value = encryption.SignedValue(store.CookieOptions.CookieSecret, store.CookieOptions.CookieName, value, now)
 	}
 	return cookies.MakeCookieFromOptions(
 		req,
@@ -230,7 +230,7 @@ func (store *SessionStore) getTicket(requestCookie *http.Cookie) (*TicketData, e
 	}
 
 	// An existing cookie exists, try to retrieve the ticket
-	val, _, ok := cookie.Validate(requestCookie, store.CookieOptions.CookieSecret, store.CookieOptions.CookieExpire)
+	val, _, ok := encryption.Validate(requestCookie, store.CookieOptions.CookieSecret, store.CookieOptions.CookieExpire)
 	if !ok {
 		// Cookie is invalid, create a new ticket
 		return newTicket()
diff --git a/pkg/sessions/session_store_test.go b/pkg/sessions/session_store_test.go
index 47ad4b7..fd0b0e5 100644
--- a/pkg/sessions/session_store_test.go
+++ b/pkg/sessions/session_store_test.go
@@ -13,10 +13,10 @@ import (
 	"github.com/alicebob/miniredis"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/pkg/apis/options"
 	sessionsapi "github.com/pusher/oauth2_proxy/pkg/apis/sessions"
 	"github.com/pusher/oauth2_proxy/pkg/cookies"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 	"github.com/pusher/oauth2_proxy/pkg/sessions"
 	sessionscookie "github.com/pusher/oauth2_proxy/pkg/sessions/cookie"
 	"github.com/pusher/oauth2_proxy/pkg/sessions/redis"
@@ -158,7 +158,7 @@ var _ = Describe("NewSessionStore", func() {
 				BeforeEach(func() {
 					By("Using a valid cookie with a different providers session encoding")
 					broken := "BrokenSessionFromADifferentSessionImplementation"
-					value := cookie.SignedValue(cookieOpts.CookieSecret, cookieOpts.CookieName, broken, time.Now())
+					value := encryption.SignedValue(cookieOpts.CookieSecret, cookieOpts.CookieName, broken, time.Now())
 					cookie := cookies.MakeCookieFromOptions(request, cookieOpts.CookieName, value, cookieOpts, cookieOpts.CookieExpire, time.Now())
 					request.AddCookie(cookie)
 
@@ -354,7 +354,7 @@ var _ = Describe("NewSessionStore", func() {
 				_, err := rand.Read(secret)
 				Expect(err).ToNot(HaveOccurred())
 				cookieOpts.CookieSecret = base64.URLEncoding.EncodeToString(secret)
-				cipher, err := cookie.NewCipher(utils.SecretBytes(cookieOpts.CookieSecret))
+				cipher, err := encryption.NewCipher(utils.SecretBytes(cookieOpts.CookieSecret))
 				Expect(err).ToNot(HaveOccurred())
 				Expect(cipher).ToNot(BeNil())
 				opts.Cipher = cipher
diff --git a/pkg/sessions/utils/utils.go b/pkg/sessions/utils/utils.go
index 051e9cc..1fb27f4 100644
--- a/pkg/sessions/utils/utils.go
+++ b/pkg/sessions/utils/utils.go
@@ -3,17 +3,17 @@ package utils
 import (
 	"encoding/base64"
 
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/pkg/apis/sessions"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 )
 
 // CookieForSession serializes a session state for storage in a cookie
-func CookieForSession(s *sessions.SessionState, c *cookie.Cipher) (string, error) {
+func CookieForSession(s *sessions.SessionState, c *encryption.Cipher) (string, error) {
 	return s.EncodeSessionState(c)
 }
 
 // SessionFromCookie deserializes a session from a cookie value
-func SessionFromCookie(v string, c *cookie.Cipher) (s *sessions.SessionState, err error) {
+func SessionFromCookie(v string, c *encryption.Cipher) (s *sessions.SessionState, err error) {
 	return sessions.DecodeSessionState(v, c)
 }
 
diff --git a/providers/provider_default.go b/providers/provider_default.go
index 4716014..d87b939 100644
--- a/providers/provider_default.go
+++ b/providers/provider_default.go
@@ -10,8 +10,8 @@ import (
 	"net/url"
 	"time"
 
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/pkg/apis/sessions"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 )
 
 // Redeem provides a default implementation of the OAuth2 token redemption process
@@ -96,12 +96,12 @@ func (p *ProviderData) GetLoginURL(redirectURI, state string) string {
 }
 
 // CookieForSession serializes a session state for storage in a cookie
-func (p *ProviderData) CookieForSession(s *sessions.SessionState, c *cookie.Cipher) (string, error) {
+func (p *ProviderData) CookieForSession(s *sessions.SessionState, c *encryption.Cipher) (string, error) {
 	return s.EncodeSessionState(c)
 }
 
 // SessionFromCookie deserializes a session from a cookie value
-func (p *ProviderData) SessionFromCookie(v string, c *cookie.Cipher) (s *sessions.SessionState, err error) {
+func (p *ProviderData) SessionFromCookie(v string, c *encryption.Cipher) (s *sessions.SessionState, err error) {
 	return sessions.DecodeSessionState(v, c)
 }
 
diff --git a/providers/providers.go b/providers/providers.go
index 57ace41..baf723d 100644
--- a/providers/providers.go
+++ b/providers/providers.go
@@ -1,8 +1,8 @@
 package providers
 
 import (
-	"github.com/pusher/oauth2_proxy/cookie"
 	"github.com/pusher/oauth2_proxy/pkg/apis/sessions"
+	"github.com/pusher/oauth2_proxy/pkg/encryption"
 )
 
 // Provider represents an upstream identity provider implementation
@@ -15,8 +15,8 @@ type Provider interface {
 	ValidateSessionState(*sessions.SessionState) bool
 	GetLoginURL(redirectURI, finalRedirect string) string
 	RefreshSessionIfNeeded(*sessions.SessionState) (bool, error)
-	SessionFromCookie(string, *cookie.Cipher) (*sessions.SessionState, error)
-	CookieForSession(*sessions.SessionState, *cookie.Cipher) (string, error)
+	SessionFromCookie(string, *encryption.Cipher) (*sessions.SessionState, error)
+	CookieForSession(*sessions.SessionState, *encryption.Cipher) (string, error)
 }
 
 // New provides a new Provider based on the configured provider string