iPhone: supported algorithm for Encryption /decryption

i am new to iPhone. i want to know which Encryption /decryption algorithm is supported by iPhone ? please 开发者_如何学运维suggest or provide me some helpful link

You can find supported standard encryption algorithms in CommonCryptor.h header:

enum {
    kCCAlgorithmAES128 = 0,
    kCCAlgorithmDES,        
    kCCAlgorithm3DES,       
    kCCAlgorithmCAST,       
    kCCAlgorithmRC4,
    kCCAlgorithmRC2     
};