title: encryption decryption between php and objective c
body: <p>i am going to start my application, which contains  encryption decryption for objective c .</p>
  
  <p>in this app of mine , i have received datas from php webservices and i have to make decryption of those datas.</p>
  
  <p>in the other case , i have to save my datas in my local database in the encrypted manner, and then i have to just send those datas from my database to php server. and they (php server) have to decrypt those data.</p>
  
  <p>so for this communication which will be best, secure and approved my apple encryption/decryption algorithm ?</p>
  
  <p>php side they are using AES_ENCRYPT.</p>
  
  <p>is there any library for it ?</p>