[11769] in cryptography@c2.net mail archive
Re: RSA's RC5-64 Secret Key Challenge has been solved.
daemon@ATHENA.MIT.EDU (Greg Rose)
Fri Sep 27 13:09:52 2002
Date: Sat, 28 Sep 2002 03:02:47 +1000
To: "Ralf-P. Weinmann" <weinmann@cdc.informatik.tu-darmstadt.de>
From: Greg Rose <ggr@qualcomm.com>
Cc: John Gilmore <gnu@toad.com>,
"Trei, Peter" <ptrei@rsasecurity.com>,
"'cryptography@wasabisystems.com'" <cryptography@wasabisystems.com>
In-Reply-To: <20020927131619.A17369@cdc-ws1.cdc.informatik.tu-darmstadt.
de>
At 01:16 PM 9/27/2002 +0200, Ralf-P. Weinmann wrote:
>Is A5/3 deployed yet?
Kasumi (in the form of "f8" (ciphering) and "f9" (integrity) is beginning
to be deployed in UMTS (WidebandCDMA) mobiles as we speak. But an exact
specification of how to use Kasumi as A5/3 has only just been agreed; it
will be 6-12 months (at least) before any significant amount of equipment,
either fixed or mobile, will be produced and deployed, and it will be a
couple more years after that before there will be significant probability
that a call is encrypted using A5/3.
>As for A5/3, I'm not really sure what key length network operators are/will be
>using, 64-128 bits are allowed in the design requirements documentation. The
>specification should be available on the 3GPP website. A5/3 is based on
>Kasumi.
A5/3 will be stuck at 64 bit keys for the forseeable future, due to
compatibility issues in the protocol. f8 and f9, on the other hand, already
use 128-bit keys.
regards,
Greg.
Greg Rose INTERNET: ggr@qualcomm.com
Qualcomm Australia VOICE: +61-2-9817 4188 FAX: +61-2-9817 5199
Level 3, 230 Victoria Road, http://people.qualcomm.com/ggr/
Gladesville NSW 2111 232B EC8F 44C6 C853 D68F E107 E6BF CD2F 1081 A37C
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