non-standard CFB (Re: Lutz formal spec / ROT-13 persists)
Jon Callas
jon at pgp.com
Tue Feb 17 19:16:55 CET 1998
At 12:26 AM 2/13/98 GMT, Adam Back wrote:
Werner Koch <wk at isil.d.shuttle.de> writes:
> By the way, is is really required that PGP's strange CFB mode is
> required for other ciphers that IDEA?
I argued against earlier on list, and argued for the non-standard CFB
to be depracated for all ciphers. However I think pgp5.x already is
deployed with non-standard CFB for CAST (and I presume 3DES also).
We're stuck with the non-standard CFB (which is used for all ciphers) until
OpenPGP v2. It's needed for backwards compatibility. Sorry.
Jon
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