On Wednesday, October 5, 2011, Aaron Toponce wrote: > On Wed, Oct 05, 2011 at 10:42:58AM -0400, Robert J. Hansen wrote: > > On 10/5/11 10:38 AM, Thomas Harning Jr. wrote: > > > Certain modes of AES can be safely parallelizable in both > > > directions: CTR can be since it uses a counter value to make each > > > encryption different for the XOR operation used. > > I didn't see this message in the thread on the list. Was this sent > privately to Mr. Hansen? > > > CTAK encryption is not parallelizable. Given that's the mode used in > > GnuPG, GnuPG's symmetric encryption is not parallelizable. There do > > exist some parallelizable modes, but GnuPG doesn't use them. > > That's what I wanted to know. Your response makes perfect sense. Thanks. > I had done a reply-all... wonder if something's blocking it.
Mr. Hansen, thanks for the correction on CTAK, made me re-look into the specific details of CTAK... whoops. Should have taken a look at the OpenPGP specification and noticed that CFB is what is used for all symmetric encryption. -- Thomas Harning Jr.
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