diff --git a/src/controllers/session-controller.php b/src/controllers/session-controller.php
index de2206c..44123c9 100644
--- a/src/controllers/session-controller.php
+++ b/src/controllers/session-controller.php
@@ -41,7 +41,7 @@ public function create()
     if ($private)
       $token = $this->createHash($data["name"], $data["password"]);
     else
-      $token = $this->createHash($data["name"], bin2hex(random_bytes(8)));   
+      $token = $this->createHash($data["name"], $this->randomKey());   
     $session->setToken($token);
       
     $session->setLastAction(new DateTime());
@@ -53,6 +53,16 @@ public function create()
     return new NumericResponse($session->getId());
   }
 
+  // Generate a random key for the public session token
+  private function randomKey()
+  {
+    if (PHP_MAJOR_VERSION >= 7)
+      $bytes = random_bytes(8);
+    else
+      $bytes = openssl_random_pseudo_bytes(8);
+    return bin2hex($bytes);
+  }
+
   // Add or remove member
   // URL: /api/session/member/{id}/?{mid}
   public function member($sessionId, $memberId = 0)