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   <H1>[pycrypto] DES/DES3/XOR/etc removal</H1>
    <B>James A. Donald</B> 
    <A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=%5Bpycrypto%5D%20DES/DES3/XOR/etc%20removal&In-Reply-To=10128ef10904221055x7f7bff03xf0a610b666f591d2%40mail.gmail.com"
       TITLE="[pycrypto] DES/DES3/XOR/etc removal">jamesd at echeque.com
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    <I>Thu Apr 23 01:52:51 CST 2009</I>
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<PRE>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.
</PRE>


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