MDC & Symmetric
Tue May 21 18:38:30 2002
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David Shaw wrote:
> On Tue, May 21, 2002 at 08:45:54AM +0200, disastry wrote:
> > David Shaw email@example.com wrote:
> > >
> > > On Mon, May 20, 2002 at 11:30:58AM +0000, Aurelio Turco wrote:
> > > > Does gpg's symmetric encryption also benefit from
> > > > MDC (Modification Detection Code)?
> > >
> > > Yes. Since unlike PK encryption, there is no way to tell if the
> > > recepient can handle it, it is off by default. You usually need to
> > > turn it on via --force-mdc.
> > > It is on by default on all of the >128bit ciphers.
> > > David
> > so this includes 3DES (it's 168 bit) and excludes AES128? ;->>
> > no,
> > this is default for all ciphers with blocksize >= 128bits:
> > AES128/192/256 and Twofish.
> Sorry - I did indeed mean block size, and not key size. However, what
> you say above is not correct: it's block size > 128. AES128 is not
> included here.
there are no ciphers with block size > 128 in GPG ;->>>
only 64 and 128
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