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From: Paulo S. L. M. Barreto (paulo.barretoterra.com.br)
Date: Thu Aug 02 2001 - 20:40:32 CDT

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    NSA has recently convinced NIST to include a new algorithm - something they
    dubbed "Double Counter" mode after 18 months of development - for
    consideration as a possible standard mode of operation for the AES. It's
    described at <http://csrc.nist.gov/encryption/modes/proposedmodes/>, but I
    wouldn't bother reading it now had I not done it already. The new mode seems
    to have been reduced to bits by Phillip Rogaway, David Wagner and others.

    Could it be that the NSA is losing its proverbial cryptologic skills? For
    one can't help but conclude that, if they acted in good faith to provide a
    useful mode, then they did a very poor job, and if they acted otherwise,
    then they quite underestimate current public knowledge in the area.

    Paulo Barreto.