Index: t3lib/class.t3lib_userauth.php
===================================================================
--- t3lib/class.t3lib_userauth.php	(revision 8265)
+++ t3lib/class.t3lib_userauth.php	(working copy)
@@ -686,7 +686,7 @@
 	 * @return	string		The new session ID
 	 */
 	public function createSessionId() {
-		return substr(md5(uniqid('') . getmypid()), 0, $this->hash_length);
+		return t3lib_div::getRandomHexString($this->hash_length);
 	}
 
 
Index: typo3/sysext/install/mod/class.tx_install_ajax.php
===================================================================
--- typo3/sysext/install/mod/class.tx_install_ajax.php	(revision 8265)
+++ typo3/sysext/install/mod/class.tx_install_ajax.php	(working copy)
@@ -127,8 +127,7 @@
 			header("Content-type: text/plain");
 		}
 
-		$bytes = t3lib_div::generateRandomBytes($keyLength);
-		return substr(bin2hex($bytes), -96);
+		return t3lib_div::getRandomHexString($keyLength);
 	}
 
 	/**