diff --git a/src/AES.php b/src/AES.php
index 2c81f2a..998b1a5 100644
--- a/src/AES.php
+++ b/src/AES.php
@@ -6,7 +6,7 @@ interface AES
 {
     public function password(string $password): AES;
 
-    public function encrypt(?array $data, string $password): string;
+    public function encrypt(string $data): string;
 
-    public function decrypt(string $data, string $password): ?array;
+    public function decrypt(string $data): string;
 }
diff --git a/src/RSA.php b/src/RSA.php
index 8426cf8..c936287 100644
--- a/src/RSA.php
+++ b/src/RSA.php
@@ -8,7 +8,7 @@ interface RSA
 
     public function privateKey(): string;
 
-    public function encrypt(?array $data): string;
+    public function encrypt(string $data, bool $public = true): string;
 
-    public function decrypt(string $data): ?array;
+    public function decrypt(string $data, bool $public = true): string;
 }