Encryption in iphone and decryption in php

I want to encrypt the sound in objective c (iPhone), so that i can send it to web server, after sending the php automatically decrypt the file. Is there any way, kindly help me...

I 开发者_运维问答have sound in NSData variable.

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The iPhone SDK includes the Security Framework, this library includes many common crypto functions.

If you're a little more specific I can help you out with a high level implementation.