diff --git a/src/Crypt/Cipher/PhpAesCipher.php b/src/Crypt/Cipher/PhpAesCipher.php
index 340b5a3b8..9c0c91eb4 100644
--- a/src/Crypt/Cipher/PhpAesCipher.php
+++ b/src/Crypt/Cipher/PhpAesCipher.php
@@ -43,7 +43,7 @@ class PhpAesCipher implements CipherInterface
 	 */
 	public function decrypt($data, $key = null, $iv = null)
 	{
-		return \AesCtr::decrypt($data, $key, $this->keyLength);
+		return \AesCtr::decrypt(base64_decode($data), $key, $this->keyLength);
 	}
 
 	/**
@@ -60,6 +60,6 @@ public function decrypt($data, $key = null, $iv = null)
 	 */
 	public function encrypt($data, $key = null, $iv = null)
 	{
-		return \AesCtr::encrypt($data, $key, $this->keyLength);
+		return base64_encode(\AesCtr::encrypt($data, $key, $this->keyLength));
 	}
 }
diff --git a/src/Crypt/Cipher/SimpleCipher.php b/src/Crypt/Cipher/SimpleCipher.php
index 29fe68725..585c919c0 100644
--- a/src/Crypt/Cipher/SimpleCipher.php
+++ b/src/Crypt/Cipher/SimpleCipher.php
@@ -35,6 +35,8 @@ class SimpleCipher implements CipherInterface
 	 */
 	public function decrypt($data, $key = null, $iv = null)
 	{
+		$data = base64_decode($data);
+
 		if (!$iv)
 		{
 			$iv = substr($data, 0, static::DEFAULT_RANDOM_BYTE_LENGTH);
@@ -99,7 +101,7 @@ public function encrypt($data, $key = null, $iv = null)
 
 		$key = sha1($iv . $key);
 
-		return $iv . $this->doEncrypt($data, $key);
+		return base64_encode($iv . $this->doEncrypt($data, $key));
 	}
 
 	/**
diff --git a/src/Crypt/Crypt.php b/src/Crypt/Crypt.php
index 7b51a397e..40e5b07c8 100644
--- a/src/Crypt/Crypt.php
+++ b/src/Crypt/Crypt.php
@@ -89,12 +89,6 @@ public function encrypt($string, $key = null, $iv = null)
 	 */
 	public function decrypt($string, $key = null, $iv = null)
 	{
-		// B/C for 3.1 and older
-		if (strpos($string, ':') !== false)
-		{
-			$string = base64_decode(str_replace(' ', '+', $string));
-		}
-
 		$key = $key ? : $this->getKey();
 		$iv  = $iv  ? : $this->getIv();
 
diff --git a/src/Crypt/Mcrypt/AbstractMcryptCipher.php b/src/Crypt/Mcrypt/AbstractMcryptCipher.php
index b4ca162ba..146522872 100644
--- a/src/Crypt/Mcrypt/AbstractMcryptCipher.php
+++ b/src/Crypt/Mcrypt/AbstractMcryptCipher.php
@@ -68,6 +68,8 @@ public function __construct()
 	 */
 	public function decrypt($data, $key = null, $iv = null)
 	{
+		$data = base64_decode($data);
+
 		if (!$iv)
 		{
 			$ivSize = $this->getIVSize();
@@ -120,7 +122,7 @@ public function encrypt($data, $key = null, $iv = null)
 		// Encrypt the data.
 		$encrypted = mcrypt_encrypt($this->type, $key, $data, $this->mode, $iv);
 
-		return $iv . $encrypted;
+		return base64_encode($iv . $encrypted);
 	}
 
 	/**
diff --git a/src/Crypt/Test/Cipher/BlowfishCipherTest.php b/src/Crypt/Test/Cipher/BlowfishCipherTest.php
index 11d464be9..e748bf801 100644
--- a/src/Crypt/Test/Cipher/BlowfishCipherTest.php
+++ b/src/Crypt/Test/Cipher/BlowfishCipherTest.php
@@ -9,6 +9,7 @@
 namespace Windwalker\Crypt\Test\Cipher;
 
 use Windwalker\Crypt\Cipher\BlowfishCipher;
+use Windwalker\Crypt\Crypt;
 
 /**
  * Test class of CipherBlowfish
diff --git a/src/Crypt/Test/Cipher/SimpleCipherTest.php b/src/Crypt/Test/Cipher/SimpleCipherTest.php
index 5101ff2fb..0422d5b15 100644
--- a/src/Crypt/Test/Cipher/SimpleCipherTest.php
+++ b/src/Crypt/Test/Cipher/SimpleCipherTest.php
@@ -87,18 +87,9 @@ public function testEncrypt()
 	 */
 	public function testDecrypt()
 	{
-		// Use IV
-		$iv = CryptHelper::genRandomBytes(16);
-
-		$data = $this->instance->encrypt('windwalker', $this->key, $iv);
-
-		$ivSize = strlen($iv);
-
-		$iv = substr($data, 0, $ivSize);
-
-		$data = substr($data, $ivSize);
+		$data = $this->instance->encrypt('windwalker', $this->key);
 
-		$data = $this->instance->decrypt($data, $this->key, $iv);
+		$data = $this->instance->decrypt($data, $this->key);
 
 		$this->assertEquals('windwalker', $data);
 	}
diff --git a/src/Crypt/Test/CryptTest.php b/src/Crypt/Test/CryptTest.php
index 9b87bd526..880d8a502 100644
--- a/src/Crypt/Test/CryptTest.php
+++ b/src/Crypt/Test/CryptTest.php
@@ -8,6 +8,7 @@
 
 namespace Windwalker\Crypt\Test;
 
+use Windwalker\Crypt\Cipher\PhpAesCipher;
 use Windwalker\Crypt\Cipher\SimpleCipher;
 use Windwalker\Crypt\Crypt;
 
@@ -33,7 +34,7 @@ class CryptTest extends \PHPUnit\Framework\TestCase
 	 */
 	protected function setUp()
 	{
-		$this->instance = new Crypt(new SimpleCipher);
+		$this->instance = new Crypt(new PhpAesCipher);
 	}
 
 	/**
@@ -56,15 +57,15 @@ protected function tearDown()
 	 */
 	public function testEncrypt()
 	{
-		$hash = $this->instance->encrypt('windwalker');
+		$encrypted = $this->instance->encrypt('windwalker');
 
-		$this->assertTrue($this->instance->verify('windwalker', $hash));
+		$this->assertTrue($this->instance->verify('windwalker', $encrypted));
 
-		$crypt = new Crypt(new SimpleCipher, 'flower');
+		$crypt = new Crypt(new PhpAesCipher, 'flower');
 
-		$hash = $crypt->encrypt('windwalker');
+		$encrypted = $crypt->encrypt('windwalker');
 
-		$this->assertTrue($crypt->verify('windwalker', $hash, 'flower'));
+		$this->assertTrue($crypt->verify('windwalker', $encrypted, 'flower'));
 	}
 
 	/**