diff --git a/.env.dev.sample b/.env.dev.sample
index 6c2dfd228..003366c1a 100644
--- a/.env.dev.sample
+++ b/.env.dev.sample
@@ -9,7 +9,8 @@ AUTH_API_KEY_FILE=/apikey/sample.csv
 AUTH_TLS_CA=/ca/ca.crt
 
 # OpenID Connect
-#AUTH_OIDC_ISSUER_URL={ENTER your Identity provider URL here, example: https://consensys.eu.auth0.com}
+#AUTH_OIDC_ISSUER_URL={ENTER your Identity Provider(IDP) URL here, example: https://consensys.eu.auth0.com}
+#AUTH_OIDC_AUDIENCE={ENTER your IDP used audience, example: https://quorum-key-manager.consensys.net}
 
 ## Start HTTPS server
 HTTPS_ENABLED=true
diff --git a/deps/config/apikey/sample.csv b/deps/config/apikey/sample.csv
index 700393df3..75f2e3a8d 100644
--- a/deps/config/apikey/sample.csv
+++ b/deps/config/apikey/sample.csv
@@ -1,5 +1,7 @@
 ## Notes: Request headers should be "Authorization: Basic base64({user-key})"
 ## Column separator is ","
 
-admin-user,tenant1|user1,"*:*","admin"
-guest-user,tenant2|user2,"*:secrets *:keys read:ethereum","anonymous"
+# sha256("admin-user")
+f470213d9ae659187a19b9cb2169b4b400544f4d3f59250eda657154700da616,tenant1|user1,"*:*","admin"
+# sha256("guest-user")
+8605f70ff5f55e2a9323d97de3dbf8e61f38314d93298ca00e19f8918fe8971b,tenant2|user2,"*:secrets *:keys read:ethereum","anonymous"
diff --git a/go.mod b/go.mod
index 208833bf4..f19f51a43 100644
--- a/go.mod
+++ b/go.mod
@@ -47,7 +47,7 @@ require (
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.7.1
 	github.com/stretchr/testify v1.7.0
-	github.com/swaggo/swag v1.7.6
+	github.com/swaggo/swag v1.7.6 // indirect
 	go.elastic.co/ecszap v1.0.0
 	go.uber.org/atomic v1.8.0 // indirect
 	go.uber.org/multierr v1.7.0 // indirect
diff --git a/src/auth/service/authenticator/authenticator.go b/src/auth/service/authenticator/authenticator.go
index b3a5e3b65..38632c729 100644
--- a/src/auth/service/authenticator/authenticator.go
+++ b/src/auth/service/authenticator/authenticator.go
@@ -5,7 +5,6 @@ import (
 	"crypto/sha256"
 	tls2 "crypto/tls"
 	"crypto/x509"
-	"encoding/base64"
 	"fmt"
 	"hash"
 	"strings"
@@ -78,10 +77,11 @@ func (authen *Authenticator) AuthenticateAPIKey(_ context.Context, apiKey []byte
 		return nil, fmt.Errorf("failed to hash api key")
 	}
 
-	claims, ok := authen.apiKeyClaims[base64.StdEncoding.EncodeToString(authen.hasher.Sum(nil))]
+	apiKeySha256 := fmt.Sprintf("%x", authen.hasher.Sum(nil))
+	claims, ok := authen.apiKeyClaims[apiKeySha256]
 	if !ok {
-		errMessage := "api key not found"
-		authen.logger.Warn(errMessage, "api_key_hash", apiKey)
+		errMessage := "invalid api key"
+		authen.logger.Warn(errMessage)
 		return nil, errors.UnauthorizedError(errMessage)
 	}
 
diff --git a/src/auth/service/authenticator/authenticator_test.go b/src/auth/service/authenticator/authenticator_test.go
index 77223e687..0e7511ff8 100644
--- a/src/auth/service/authenticator/authenticator_test.go
+++ b/src/auth/service/authenticator/authenticator_test.go
@@ -2,9 +2,9 @@ package authenticator
 
 import (
 	"context"
+	"crypto/sha256"
 	tls2 "crypto/tls"
 	"crypto/x509"
-	"encoding/base64"
 	"fmt"
 	"testing"
 
@@ -51,9 +51,13 @@ func (s *authenticatorTestSuite) SetupTest() {
 	aliceClaims := testdata.FakeUserClaims()
 	bobClaims := testdata.FakeUserClaims()
 	bobClaims.Scope = "*:*"
+
+	aliceSha256 := fmt.Sprintf("%x", sha256.Sum256([]byte(aliceAPIKey)))
+	bobSha256 := fmt.Sprintf("%x", sha256.Sum256([]byte(bobAPIKey)))
+
 	s.userClaims = map[string]*entities.UserClaims{
-		"BRqrbYycs44wSi40uij02ZlPd5zBxuWIMessUGcdxtI=": aliceClaims, // base64 of alice key
-		"XWubgVAkP8ug1MD+9JqFuMYvKE6phwFYRC/9ALdvFss=": bobClaims,   // base64 of bob key
+		aliceSha256: aliceClaims, // base64 of alice key
+		bobSha256:   bobClaims,   // base64 of bob key
 	}
 
 	// TLS certs
@@ -126,9 +130,7 @@ func (s *authenticatorTestSuite) TestAuthenticateAPIKey() {
 	ctx := context.Background()
 
 	s.Run("should authenticate with api key successfully", func() {
-		aliceKey, _ := base64.StdEncoding.DecodeString(aliceAPIKey)
-
-		userInfo, err := s.auth.AuthenticateAPIKey(ctx, aliceKey)
+		userInfo, err := s.auth.AuthenticateAPIKey(ctx, []byte(aliceAPIKey))
 
 		require.NoError(s.T(), err)
 		assert.Equal(s.T(), "Alice", userInfo.Username)
@@ -139,27 +141,23 @@ func (s *authenticatorTestSuite) TestAuthenticateAPIKey() {
 	})
 
 	s.Run("should authenticate an api key successfully with wildcard permissions", func() {
-		bobKey, _ := base64.StdEncoding.DecodeString(bobAPIKey)
-
-		userInfo, err := s.auth.AuthenticateAPIKey(ctx, bobKey)
+		userInfo, err := s.auth.AuthenticateAPIKey(ctx, []byte(bobAPIKey))
 
 		require.NoError(s.T(), err)
 		assert.Equal(s.T(), entities.NewWildcardUser().Permissions, userInfo.Permissions)
 	})
 
 	s.Run("should return UnauthorizedError if api key is not found", func() {
-		invalidKey, _ := base64.StdEncoding.DecodeString("invalid-key")
-		userInfo, err := s.auth.AuthenticateAPIKey(ctx, invalidKey)
+		userInfo, err := s.auth.AuthenticateAPIKey(ctx, []byte("invalid-key"))
 
 		require.Nil(s.T(), userInfo)
 		assert.True(s.T(), errors.IsUnauthorizedError(err))
 	})
 
 	s.Run("should return UnauthorizedError if the authentication method is not enabled", func() {
-		aliceKey, _ := base64.StdEncoding.DecodeString(aliceAPIKey)
 		auth := New(nil, nil, nil, s.logger)
 
-		userInfo, err := auth.AuthenticateAPIKey(ctx, aliceKey)
+		userInfo, err := auth.AuthenticateAPIKey(ctx, []byte(aliceAPIKey))
 
 		require.Nil(s.T(), userInfo)
 		assert.True(s.T(), errors.IsUnauthorizedError(err))
diff --git a/src/infra/api-key/csv/reader.go b/src/infra/api-key/csv/reader.go
index 3604f0748..4220a024c 100644
--- a/src/infra/api-key/csv/reader.go
+++ b/src/infra/api-key/csv/reader.go
@@ -2,11 +2,8 @@ package csv
 
 import (
 	"context"
-	"crypto/sha256"
-	"encoding/base64"
 	csv2 "encoding/csv"
 	"fmt"
-	"hash"
 	"io"
 	"os"
 
@@ -18,15 +15,14 @@ const (
 	csvSeparator         = ','
 	csvCommentsMarker    = '#'
 	csvRowLen            = 4
-	csvHashOffset        = 0
+	csvAPIKeyHash        = 0
 	csvUserOffset        = 1
 	csvPermissionsOffset = 2
 	csvRolesOffset       = 3
 )
 
 type Reader struct {
-	path   string
-	hasher hash.Hash
+	path string
 }
 
 var _ apikey.Reader = &Reader{}
@@ -37,7 +33,7 @@ func New(cfg *Config) (*Reader, error) {
 		return nil, err
 	}
 
-	return &Reader{path: cfg.Path, hasher: sha256.New()}, nil
+	return &Reader{path: cfg.Path}, nil
 }
 
 func (r *Reader) Load(_ context.Context) (map[string]*entities.UserClaims, error) {
@@ -65,14 +61,7 @@ func (r *Reader) Load(_ context.Context) (map[string]*entities.UserClaims, error
 			return nil, fmt.Errorf("invalid number of cells, should be %d", csvRowLen)
 		}
 
-		r.hasher.Reset()
-		_, err = r.hasher.Write([]byte(cells[csvHashOffset]))
-		if err != nil {
-			return nil, fmt.Errorf("failed to hash api key")
-		}
-
-		apiKeyHash := base64.StdEncoding.EncodeToString(r.hasher.Sum(nil))
-		claims[apiKeyHash] = &entities.UserClaims{
+		claims[cells[csvAPIKeyHash]] = &entities.UserClaims{
 			Subject: cells[csvUserOffset],
 			Scope:   cells[csvPermissionsOffset],
 			Roles:   cells[csvRolesOffset],