每秒查100亿亿次，解破256位加密需要3×10的51次方年，呵呵

AES permits the use of 256-bit keys. Breaking a symmetric 256-bit key by brute force requires 2¹²⁸ times more computational power than a 128-bit key. A device that could check a billion billion (10¹⁸) AES keys per second (if such a device could ever be made) would in theory require about 3×10⁵¹ years to exhaust the 256-bit key space.

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• 你什么时候用，他就什么时候知道。要存一份密码的拷贝也可以。哪用那么麻烦... -yuhaian- ♂ (0 bytes) () 05/03/2012 postreply 04:17:39