[pycrypto] DES/DES3/XOR/etc removal

James A. Donald jamesd at echeque.com
Thu Apr 23 01:52:51 CST 2009

You should never break backwards compatibility - observe that most DOS 
programs still run.

No matter how bad the old version, if one needs to introduce 
compatibility breaking changes, you need a compatibility mode and an 
implicit or explicit protocol negotiation phase.

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