note 20267 added to ref.mcrypt

If you are using ECB mode to encrypt it does not seem to use the iv (initialization vector) for much of anything, given the same key it will always decrypt it no matter what the iv is. If you use CBC mode you must decrypt with the same iv that you encrypted with. If you use a different iv before decrypting, your decrypt will not work. IMHO it seems better to use CBC mode than ECB as ECB will always encrypt to the same cipher text given the same plain text (leaving you open to know plaintext attacks). CBC uses the random iv which means text encrypts to different things. You probably could get the same effect from using random keys in ECB mode. Read that in the Schneier book - Applied Cryptography (ISBN 0-471-11709-9) This book is a must for anyone seriously using any type of encryption. -- http://www.php.net/manual/en/ref.mcrypt.php http://master.php.net/manage/user-notes.php?action=edit+20267 http://master.php.net/manage/user-notes.php?action=delete+20267 http://master.php.net/manage/user-notes.php?action=reject+20267