I dont know how this works, but could this be included in your next agenda? I need your inputs and comments, http://tools.ietf.org/html/draft-d-sec-udt-00----- Original Message ----- From: <saag-request at ietf.org>
To: <saag at ietf.org> Sent: Wednesday, October 21, 2009 6:00 AM Subject: saag Digest, Vol 16, Issue 4
If you have received this digest without all the individual message attachments you will need to update your digest options in your list subscription. To do so, go to https://www.ietf.org/mailman/listinfo/saag Click the 'Unsubscribe or edit options' button, log in, and set "Get MIME or Plain Text Digests?" to MIME. You can set this option globally for all the list digests you receive at this point. Send saag mailing list submissions to saag at ietf.org To subscribe or unsubscribe via the World Wide Web, visit https://www.ietf.org/mailman/listinfo/saag or, via email, send a message with subject or body 'help' to saag-request at ietf.org You can reach the person managing the list at saag-owner at ietf.org When replying, please edit your Subject line so it is more specific than "Re: Contents of saag digest..." Today's Topics: 1. Re: A question about AES properties... (bcn at ISI.EDU) ---------------------------------------------------------------------- Message: 1 Date: Mon, 19 Oct 2009 13:49:37 -0700 From: bcn at ISI.EDU Subject: Re: [saag] A question about AES properties... To: Ken Raeburn <raeburn at MIT.EDU> Cc: John Border <John.Border at hughes.com>, "saag at ietf.org" <saag at ietf.org> Message-ID: <1255985377.4adcd0e19f8af at webmail.isi.edu> Content-Type: text/plain; charset=ISO-8859-1 Quoting Ken Raeburn <raeburn at MIT.EDU>:On Oct 15, 2009, at 15:56, John Border wrote: > I have what I thought was a simple question about the properties > of AES. But, I have not been able to find an answer. Possibly that > means the question itself is flawed (but I haven?t been able to > figure that out either)? > > With AES, does the order of the functions matter, i.e. does > EK(DK(P)) = DK(EK(P))?As Ken responded, if the plaintext is a multiple of the block size, because EK and DK are inverses, the result is the identity function, so the answer to theabove is that the order does not make a difference.BUT, I expect what you might have been trying to ask is whether EK1(DK2(P)) = DK2(EK1(P)), i.e. your question above, but using two different keys. In this case, the analyses is not as simple, and I would guess that the answer is that no they are not the same. But I could be wrong. You should be able to verifythe "NO" answer with a simple experiment. Clifford Neuman ------------------------------ _______________________________________________ saag mailing list saag at ietf.org https://www.ietf.org/mailman/listinfo/saag End of saag Digest, Vol 16, Issue 4 *********************************** _____________________________________________________ This mail has been virus scanned by Australia On Line see http://www.australiaonline.net.au/mailscanning
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