final use
https://github.com/Gurpartap/AESCrypt-ObjC
https://github.com/Gurpartap/aescrypt
useful url
http://publib.boulder.ibm.com/infocenter/initiate/v9r5/index.jsp?topic=%2Fcom.ibm.einstall.doc%2Ftopics%2Ft_einstall_GenerateAESkey.html
http://www.brentsowers.com/2007/12/aes-encryption-and-decryption-in-ruby.html
http://stuff-things.net/2007/06/11/encrypting-sensitive-data-with-ruby-on-rails/
http://aminby.net/2010/06/the-mothed-of-base64-coding-for-objc/
http://developer.apple.com/library/mac/#DOCUMENTATION/Darwin/Reference/ManPages/man3/CCCrypt.3cc.html
http://stackoverflow.com/questions/5564641/how-to-use-cccrypt-to-encrypt-a-file
http://stackoverflow.com/questions/2039940/any-cocoa-source-code-for-aes-encryption-decryption
