Mailing List Archive: GnuPG: users

new AES 256 vulnerability

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vedaal at hush

Jul 30, 2009, 1:17 PM

Post #1 of 4 (898 views)
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new AES 256 vulnerability

a new attack has been found against AES - 256

http://www.schneier.com/blog/archives/2009/07/another_new_aes.html

it only works against 10 round AES-256 (which normally has 16
rounds)

(am not overly worried,
still use IDEA when encrypting for diehard pgp2.x e-mailers, and
that has 5 of 8 rounds broken ;-) ))

but as AES is the default gnupg block cipher of choice,
am just bringing it to people's attention here

vedaal

any ads or links below this message are added by hushmail without
my endorsement or awareness of the nature of the link

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rjh at sixdemonbag

Jul 30, 2009, 1:27 PM

Post #2 of 4 (844 views)
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Re: new AES 256 vulnerability [In reply to]

> (am not overly worried,
> still use IDEA when encrypting for diehard pgp2.x e-mailers, and
> that has 5 of 8 rounds broken ;-) ))

6.

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dshaw at jabberwocky

Jul 30, 2009, 1:46 PM

Post #3 of 4 (853 views)
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Re: new AES 256 vulnerability [In reply to]

On Jul 30, 2009, at 4:17 PM, vedaal [at] hush wrote:

> a new attack has been found against AES - 256
>
> http://www.schneier.com/blog/archives/2009/07/another_new_aes.html
>
> it only works against 10 round AES-256 (which normally has 16
> rounds)

It breaks 11 rounds of 14.

David

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ml at mareichelt

Jul 30, 2009, 2:41 PM

Post #4 of 4 (863 views)
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Re: new AES 256 vulnerability [In reply to]

* "Robert J. Hansen" <rjh [at] sixdemonbag> wrote:

> >(am not overly worried, still use IDEA when encrypting for diehard
> >pgp2.x e-mailers, and that has 5 of 8 rounds broken ;-) ))
>
> 6.

7 - raise? fold?

--
left blank, right bald

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