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Re: [Cryptography] NSA and cryptanalysis

daemon@ATHENA.MIT.EDU (=?ISO-8859-1?Q?Joachim_Str=F6mberg)
Thu Sep 5 13:09:29 2013

X-Original-To: cryptography@metzdowd.com
Date: Thu, 05 Sep 2013 11:26:22 +0200
From: =?ISO-8859-1?Q?Joachim_Str=F6mbergson?= <Joachim@Strombergson.com>
To: "cryptography@metzdowd.com List" <cryptography@metzdowd.com>
In-Reply-To: <D9347DC3-5BF7-43F4-ACD0-A166A3816E43@lrw.com>
Reply-To: Joachim@Strombergson.com
Errors-To: cryptography-bounces+crypto.discuss=bloom-picayune.mit.edu@metzdowd.com

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Aloha!

Jerry Leichter wrote:
> On Sep 1, 2013, at 2:11 PM, Perry E. Metzger wrote:
> =

>> On Sun, 1 Sep 2013 07:11:06 -0400 Jerry Leichter
>> <leichter@lrw.com> wrote:
>>> Meanwhile, just what evidence do we really have that AES is =

>>> secure?
>> The fact that the USG likes using it, too.
> We know they *say in public* that it's acceptable.  But do we know
> what they *actually use*?
> =

>> That's also evidence for eliptic curve techniques btw.
> Same problem.

(Slightly tangential but on topic I hope)

Am I the only surprised that the NSA designed block ciphers SIMON and
SPECK is vulnerable to differential attacks?

http://eprint.iacr.org/2013/543

If I understand the history correctly NSA supported the development of
DES as well as SHA-0/SHA-1 and their contributions shows knowledge about
differential attacks at least as far back as 1977.

- -- =

Med v=E4nlig h=E4lsning, Yours

Joachim Str=F6mbergson - Alltid i harmonisk sv=E4ngning.
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