[Q] : verify an encrypted signed file.

Florian Weimer fw@deneb.enyo.de
Tue Aug 21 12:56:01 2001

Johan Wevers <johanw@vulcan.xs4all.nl> writes:

> Werner Koch wrote:
>> The next revision of OpenPGP has a countermeasure against that. This
>> new mode is already used by GnuPG and PGP 7 if you are using
>> AES/RIJNDAEL or Twofish (i.e the recipient hast this algorithm in his
>> preferences).
> Is there a special reason whey this is only implemented for these
> algorithms, or did you just not yet have the time to implement it
> for the other algorithms?
The MDC packets are activated by certain symmetric algorithm preferences (those with a block size greater than 8 octets). Perhaps the next OpenPGP version will provide additional flags to signal to the sender that the receiver can deal with MDC packets even with other symmetric algorithms.