diff --git a/.styleci.yml b/.styleci.yml
index 6caf80c5..d3498157 100644
--- a/.styleci.yml
+++ b/.styleci.yml
@@ -29,7 +29,6 @@ enabled:
   - phpdoc_inline_tag
   - phpdoc_no_access
   - phpdoc_no_simplified_null_return
-  - phpdoc_order
   - phpdoc_property
   - phpdoc_scalar
   - phpdoc_separation
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08c40982..045e54e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
-## [7.0.0] - released 2018-02-17
+### Added
+- Added event emitters for issued access and refresh tokens (PR #860)
+- Can now use Defuse\Crypto\Key for encryption/decryption of keys which is faster than the Cryto class (PR #812)
+
+### Removed
+- Remove paragone/random_compat from dependencies
+
+## [7.0.0] - released 2018-02-18
 
 ### Added
 - Use PHPStan for static analysis of code (PR #848)
diff --git a/composer.json b/composer.json
index 8e7fd7e6..48a95701 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,6 @@
         "ext-openssl": "*",
         "league/event": "^2.1",
         "lcobucci/jwt": "^3.2.2",
-        "paragonie/random_compat": "^2.0",
         "psr/http-message": "^1.0.1",
         "defuse/php-encryption": "^2.1"
     },
diff --git a/examples/src/Repositories/ClientRepository.php b/examples/src/Repositories/ClientRepository.php
index 8d4b5219..eaa4e5c2 100644
--- a/examples/src/Repositories/ClientRepository.php
+++ b/examples/src/Repositories/ClientRepository.php
@@ -17,7 +17,7 @@ class ClientRepository implements ClientRepositoryInterface
     /**
      * {@inheritdoc}
      */
-    public function getClientEntity($clientIdentifier, $grantType, $clientSecret = null, $mustValidateSecret = true)
+    public function getClientEntity($clientIdentifier, $grantType = null, $clientSecret = null, $mustValidateSecret = true)
     {
         $clients = [
             'myawesomeapp' => [
diff --git a/src/AuthorizationServer.php b/src/AuthorizationServer.php
index 885776ec..f1e96146 100644
--- a/src/AuthorizationServer.php
+++ b/src/AuthorizationServer.php
@@ -9,6 +9,7 @@
 
 namespace League\OAuth2\Server;
 
+use Defuse\Crypto\Key;
 use League\Event\EmitterAwareInterface;
 use League\Event\EmitterAwareTrait;
 use League\OAuth2\Server\Exception\OAuthServerException;
@@ -68,7 +69,7 @@ class AuthorizationServer implements EmitterAwareInterface
     private $scopeRepository;
 
     /**
-     * @var string
+     * @var string|Key
      */
     private $encryptionKey;
 
@@ -84,7 +85,7 @@ class AuthorizationServer implements EmitterAwareInterface
      * @param AccessTokenRepositoryInterface $accessTokenRepository
      * @param ScopeRepositoryInterface       $scopeRepository
      * @param CryptKey|string                $privateKey
-     * @param string                         $encryptionKey
+     * @param string|Key                     $encryptionKey
      * @param null|ResponseTypeInterface     $responseType
      */
     public function __construct(
diff --git a/src/CryptTrait.php b/src/CryptTrait.php
index 125a757e..c9a6d7a6 100644
--- a/src/CryptTrait.php
+++ b/src/CryptTrait.php
@@ -12,11 +12,12 @@
 namespace League\OAuth2\Server;
 
 use Defuse\Crypto\Crypto;
+use Defuse\Crypto\Key;
 
 trait CryptTrait
 {
     /**
-     * @var string
+     * @var string|Key
      */
     protected $encryptionKey;
 
@@ -32,6 +33,10 @@ trait CryptTrait
     protected function encrypt($unencryptedData)
     {
         try {
+            if ($this->encryptionKey instanceof Key) {
+                return Crypto::encrypt($unencryptedData, $this->encryptionKey);
+            }
+
             return Crypto::encryptWithPassword($unencryptedData, $this->encryptionKey);
         } catch (\Exception $e) {
             throw new \LogicException($e->getMessage());
@@ -50,6 +55,10 @@ trait CryptTrait
     protected function decrypt($encryptedData)
     {
         try {
+            if ($this->encryptionKey instanceof Key) {
+                return Crypto::decrypt($encryptedData, $this->encryptionKey);
+            }
+
             return Crypto::decryptWithPassword($encryptedData, $this->encryptionKey);
         } catch (\Exception $e) {
             throw new \LogicException($e->getMessage());
@@ -59,7 +68,7 @@ trait CryptTrait
     /**
      * Set the encryption key
      *
-     * @param string $key
+     * @param string|Key $key
      */
     public function setEncryptionKey($key = null)
     {
diff --git a/src/Grant/AuthCodeGrant.php b/src/Grant/AuthCodeGrant.php
index 81152338..80e1cd0f 100644
--- a/src/Grant/AuthCodeGrant.php
+++ b/src/Grant/AuthCodeGrant.php
@@ -176,6 +176,10 @@ class AuthCodeGrant extends AbstractAuthorizeGrant
         $accessToken = $this->issueAccessToken($accessTokenTTL, $client, $authCodePayload->user_id, $scopes);
         $refreshToken = $this->issueRefreshToken($accessToken);
 
+        // Send events to emitter
+        $this->getEmitter()->emit(new RequestEvent(RequestEvent::ACCESS_TOKEN_ISSUED, $request));
+        $this->getEmitter()->emit(new RequestEvent(RequestEvent::REFRESH_TOKEN_ISSUED, $request));
+
         // Inject tokens into response type
         $responseType->setAccessToken($accessToken);
         $responseType->setRefreshToken($refreshToken);
@@ -218,6 +222,7 @@ class AuthCodeGrant extends AbstractAuthorizeGrant
             $request,
             $this->getServerParameter('PHP_AUTH_USER', $request)
         );
+
         if (is_null($clientId)) {
             throw OAuthServerException::invalidRequest('client_id');
         }
@@ -235,6 +240,7 @@ class AuthCodeGrant extends AbstractAuthorizeGrant
         }
 
         $redirectUri = $this->getQueryStringParameter('redirect_uri', $request);
+
         if ($redirectUri !== null) {
             if (
                 is_string($client->getRedirectUri())
@@ -284,6 +290,7 @@ class AuthCodeGrant extends AbstractAuthorizeGrant
             }
 
             $codeChallengeMethod = $this->getQueryStringParameter('code_challenge_method', $request, 'plain');
+
             if (in_array($codeChallengeMethod, ['plain', 'S256'], true) === false) {
                 throw OAuthServerException::invalidRequest(
                     'code_challenge_method',
diff --git a/src/Grant/ClientCredentialsGrant.php b/src/Grant/ClientCredentialsGrant.php
index ed157aaf..026ce5e5 100644
--- a/src/Grant/ClientCredentialsGrant.php
+++ b/src/Grant/ClientCredentialsGrant.php
@@ -11,6 +11,7 @@
 
 namespace League\OAuth2\Server\Grant;
 
+use League\OAuth2\Server\RequestEvent;
 use League\OAuth2\Server\ResponseTypes\ResponseTypeInterface;
 use Psr\Http\Message\ServerRequestInterface;
 
@@ -37,6 +38,9 @@ class ClientCredentialsGrant extends AbstractGrant
         // Issue and persist access token
         $accessToken = $this->issueAccessToken($accessTokenTTL, $client, null, $finalizedScopes);
 
+        // Send event to emitter
+        $this->getEmitter()->emit(new RequestEvent(RequestEvent::ACCESS_TOKEN_ISSUED, $request));
+
         // Inject access token into response type
         $responseType->setAccessToken($accessToken);
 
diff --git a/src/Grant/GrantTypeInterface.php b/src/Grant/GrantTypeInterface.php
index 0e721435..2aee367f 100644
--- a/src/Grant/GrantTypeInterface.php
+++ b/src/Grant/GrantTypeInterface.php
@@ -11,6 +11,7 @@
 
 namespace League\OAuth2\Server\Grant;
 
+use Defuse\Crypto\Key;
 use League\Event\EmitterAwareInterface;
 use League\OAuth2\Server\CryptKey;
 use League\OAuth2\Server\Repositories\AccessTokenRepositoryInterface;
@@ -136,7 +137,7 @@ interface GrantTypeInterface extends EmitterAwareInterface
     /**
      * Set the encryption key
      *
-     * @param string|null $key
+     * @param string|Key|null $key
      */
     public function setEncryptionKey($key = null);
 }
diff --git a/src/Grant/PasswordGrant.php b/src/Grant/PasswordGrant.php
index cfd7e9fe..1d00998b 100644
--- a/src/Grant/PasswordGrant.php
+++ b/src/Grant/PasswordGrant.php
@@ -59,6 +59,10 @@ class PasswordGrant extends AbstractGrant
         $accessToken = $this->issueAccessToken($accessTokenTTL, $client, $user->getIdentifier(), $finalizedScopes);
         $refreshToken = $this->issueRefreshToken($accessToken);
 
+        // Send events to emitter
+        $this->getEmitter()->emit(new RequestEvent(RequestEvent::ACCESS_TOKEN_ISSUED, $request));
+        $this->getEmitter()->emit(new RequestEvent(RequestEvent::REFRESH_TOKEN_ISSUED, $request));
+
         // Inject tokens into response
         $responseType->setAccessToken($accessToken);
         $responseType->setRefreshToken($refreshToken);
diff --git a/src/Grant/RefreshTokenGrant.php b/src/Grant/RefreshTokenGrant.php
index f8e022b4..519954be 100644
--- a/src/Grant/RefreshTokenGrant.php
+++ b/src/Grant/RefreshTokenGrant.php
@@ -65,6 +65,10 @@ class RefreshTokenGrant extends AbstractGrant
         $accessToken = $this->issueAccessToken($accessTokenTTL, $client, $oldRefreshToken['user_id'], $scopes);
         $refreshToken = $this->issueRefreshToken($accessToken);
 
+        // Send events to emitter
+        $this->getEmitter()->emit(new RequestEvent(RequestEvent::ACCESS_TOKEN_ISSUED, $request));
+        $this->getEmitter()->emit(new RequestEvent(RequestEvent::REFRESH_TOKEN_ISSUED, $request));
+
         // Inject tokens into response
         $responseType->setAccessToken($accessToken);
         $responseType->setRefreshToken($refreshToken);
diff --git a/src/RequestEvent.php b/src/RequestEvent.php
index 1558e11f..b1ca3f6b 100644
--- a/src/RequestEvent.php
+++ b/src/RequestEvent.php
@@ -18,6 +18,9 @@ class RequestEvent extends Event
     const USER_AUTHENTICATION_FAILED = 'user.authentication.failed';
     const REFRESH_TOKEN_CLIENT_FAILED = 'refresh_token.client.failed';
 
+    const REFRESH_TOKEN_ISSUED = 'refresh_token.issued';
+    const ACCESS_TOKEN_ISSUED = 'access_token.issued';
+
     /**
      * @var ServerRequestInterface
      */
diff --git a/src/ResponseTypes/ResponseTypeInterface.php b/src/ResponseTypes/ResponseTypeInterface.php
index 8ac20b8c..5eddd607 100644
--- a/src/ResponseTypes/ResponseTypeInterface.php
+++ b/src/ResponseTypes/ResponseTypeInterface.php
@@ -11,6 +11,7 @@
 
 namespace League\OAuth2\Server\ResponseTypes;
 
+use Defuse\Crypto\Key;
 use League\OAuth2\Server\Entities\AccessTokenEntityInterface;
 use League\OAuth2\Server\Entities\RefreshTokenEntityInterface;
 use Psr\Http\Message\ResponseInterface;
@@ -37,7 +38,7 @@ interface ResponseTypeInterface
     /**
      * Set the encryption key
      *
-     * @param string|null $key
+     * @param string|Key|null $key
      */
     public function setEncryptionKey($key = null);
 }
diff --git a/tests/Utils/CryptTraitTest.php b/tests/Utils/CryptTraitTest.php
index 26427e59..c517cec2 100644
--- a/tests/Utils/CryptTraitTest.php
+++ b/tests/Utils/CryptTraitTest.php
@@ -2,22 +2,34 @@
 
 namespace LeagueTests\Utils;
 
+use Defuse\Crypto\Key;
 use LeagueTests\Stubs\CryptTraitStub;
 use PHPUnit\Framework\TestCase;
 
 class CryptTraitTest extends TestCase
 {
-    /**
-     * @var \LeagueTests\Stubs\CryptTraitStub
-     */
     protected $cryptStub;
 
-    public function setUp()
+    protected function setUp()
     {
-        $this->cryptStub = new CryptTraitStub;
+        $this->cryptStub = new CryptTraitStub();
     }
 
-    public function testEncryptDecrypt()
+    public function testEncryptDecryptWithPassword()
+    {
+        $this->cryptStub->setEncryptionKey(base64_encode(random_bytes(36)));
+
+        $this->encryptDecrypt();
+    }
+
+    public function testEncryptDecryptWithKey()
+    {
+        $this->cryptStub->setEncryptionKey(Key::createNewRandomKey());
+
+        $this->encryptDecrypt();
+    }
+
+    private function encryptDecrypt()
     {
         $payload = 'alex loves whisky';
         $encrypted = $this->cryptStub->doEncrypt($payload);