Szyfrowanie nie md5!!! Opcje

[Jabol]

Mam problem z mcrypt. Zajrzałem sobie na php.net. Tam mam ładnie wyjaśnione co robią wszystkie tryby szyfrowania więc to mi nie przeszkadza. Ale tam są też różne algorytmy. I teraz mam problem bo nie mam do nich rzadnego wyjaśnienia.... A one tam są takie.
[list]
MCRYPT_3DES
*

MCRYPT_ARCFOUR_IV (libmcrypt > 2.4.x only)
*

MCRYPT_ARCFOUR (libmcrypt > 2.4.x only)
*

MCRYPT_BLOWFISH
*

MCRYPT_CAST_128
*

MCRYPT_CAST_256
*

MCRYPT_CRYPT
*

MCRYPT_DES
*

MCRYPT_DES_COMPAT (libmcrypt 2.2.x only)
*

MCRYPT_ENIGMA (libmcrypt > 2.4.x only, alias for MCRYPT_CRYPT)
*

MCRYPT_GOST
*

MCRYPT_IDEA (non-free)
*

MCRYPT_LOKI97 (libmcrypt > 2.4.x only)
*

MCRYPT_MARS (libmcrypt > 2.4.x only, non-free)
*

MCRYPT_PANAMA (libmcrypt > 2.4.x only)
*

MCRYPT_RIJNDAEL_128 (libmcrypt > 2.4.x only)
*

MCRYPT_RIJNDAEL_192 (libmcrypt > 2.4.x only)
*

MCRYPT_RIJNDAEL_256 (libmcrypt > 2.4.x only)
*

MCRYPT_RC2
*

MCRYPT_RC4 (libmcrypt 2.2.x only)
*

MCRYPT_RC6 (libmcrypt > 2.4.x only)
*

MCRYPT_RC6_128 (libmcrypt 2.2.x only)
*

MCRYPT_RC6_192 (libmcrypt 2.2.x only)
*

MCRYPT_RC6_256 (libmcrypt 2.2.x only)
*

MCRYPT_SAFER64
*

MCRYPT_SAFER128
*

MCRYPT_SAFERPLUS (libmcrypt > 2.4.x only)
*

MCRYPT_SERPENT(libmcrypt > 2.4.x only)
*

MCRYPT_SERPENT_128 (libmcrypt 2.2.x only)
*

MCRYPT_SERPENT_192 (libmcrypt 2.2.x only)
*

MCRYPT_SERPENT_256 (libmcrypt 2.2.x only)
*

MCRYPT_SKIPJACK (libmcrypt > 2.4.x only)
*

MCRYPT_TEAN (libmcrypt 2.2.x only)
*

MCRYPT_THREEWAY
*

MCRYPT_TRIPLEDES (libmcrypt > 2.4.x only)
*

MCRYPT_TWOFISH (for older mcrypt 2.x versions, or mcrypt > 2.4.x )
*

MCRYPT_TWOFISH128 (TWOFISHxxx are available in newer 2.x versions, but not in the 2.4.x versions)
*

MCRYPT_TWOFISH192
*

MCRYPT_TWOFISH256
*

MCRYPT_WAKE (libmcrypt > 2.4.x only)
*

MCRYPT_XTEA (libmcrypt > 2.4.x only)
[list]
I teraz który wybrać? Może ktoś mógłby mi pomóc w wyborze, albo conajmniej polecił lub opisał jakiś?!