在twisted的conch中会使用Crypto
Crypto是pycrypto:http://www.amk.ca/python/code/crypto 中的一个模块。
给python提供许多加密算法支持：
* Hash functions: MD2, MD4, RIPEMD, SHA256.
* Block encryption algorithms: AES, ARC2, Blowfish, CAST, DES, Triple-DES, IDEA, RC5.
* Stream encryption algorithms: ARC4, simple XOR.
* Public-key algorithms: RSA, DSA, ElGamal, qNEW.
* Protocols: All-or-nothing transforms, chaffing/winnowing.
* Miscellaneous: RFC1751 module for converting 128-key keys into a set of English words, primality testing.
* Some demo programs (currently all quite old and outdated).
这些东西以前很多是收到米国出口限制的，不过今非昔比。 使用easy_install就可以很方便的安装并使用了。
原来第一次用的时候也有这个问题。当时解决了，回来就忘了，今天有碰到了，有想了半天！才记起有这回事。
好记性不如烂笔头，还是记一笔的好！

Last Modified: Tuesday, October 16th, 2007 @ 23:29

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