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Fwd: PRIV - Crypto-smashing
- To: "fitug list" <debate@fitug.de>
- Subject: Fwd: PRIV - Crypto-smashing
- From: Boris Groendahl <boris@well.com>
- Date: Thu, 10 Jul 97 10:09:01 +0200
- Comment: This message comes from the debate mailing list.
- Sender: owner-debate@fitug.de
---------------- Begin Forwarded Message ----------------
Date: 07.02 16:01
Received: 07.10 09:37
From: FringeWare News Network, email@Fringeware.COM
Reply-To: joe@hosaka.SmallWorks.COM
fringeware list, email@Fringeware.COM
CC: Joe Corcoran, joe@hosaka.SmallWorks.COM
Sent from: Joe Corcoran <joe@hosaka.SmallWorks.COM>
In January 1996, a group of leading cryptographers calculated the time
and cost to break major encryption codes, using either standard
computers, or faster, custom-designed, code-cracking machines.
CATEGORIES:
(1) A Pedestrian hacker with a tiny budget and a scavenged computer
could hack 40-bit RC4 in 1 week (56-bit DES would be infeasible)
(2) A Small business with a $400 budget and a Field Programmable
Gate Array (FPGA) computer could hack 40-bit RC4 in 5 hours and
56-bit DES in 38 years.
(3) A Small business with a $10,000 budget and a Field Programmable
Gate Array (FPGA) computer could hack 40-bit RC4 in 12 minutes and
56-bit DES in 556 days.
(4) A Corporate department with a $300,000 budget and a Field
Programmable
Gate Array (FPGA) computer could hack 40-bit RC4 in 24 seconds and
56-bit DES in 19 days.
(5) A Corporate department with a $300,000 budget and a computer with
Application-Specific Integrated Circuits (ASIC) could hack 40-bit RC4 in
18
seconds and 56-bit DES in 3 hours.
(6) A Big company with a $10 million budget and a Field Programmable
Gate Array (FPGA) computer could hack 40-bit RC4 in 7 seconds and
56-bit DES in 13 hours.
(7) A Big company with a $10 million budget and a computer with
Application-
Specific Integrated Circuits (ASIC) could hack 40-bit RC4 in .005 seconds
and 56-bit DES in 6 minutes.
(8) And finally, an Intelligence Agency with a $300 million budget and a
computer with Application-Specific Integrated Circuits (ASIC) could hack
40-bit RC4 in .0002 seconds and 56-bit DES in 12 seconds.
Source: MINIMAL KEY LENGTHS FOR SYMMETRIC CIPHERS
----------
> Date: Wed, 2 Jul 1997 16:12:25 -0500
> From: jim@hosaka.SmallWorks.COM (Jim Thompson)
I have this paper...
The really interesting thing to watch is that going from 40 bits to 56
bits
makes the time go up by a factor of 70,000 (with today's technology.)
e.g. adding 16 bits (16 doublings of the keyspace) makes the effort go up
by a factor of 70,000X
Tripple-DES adds another effective 56 bits onto the key length, so it's
still secure. There is also a DES-X that is being dicussed that adds
about 16 bits of effective key length to a 56-bit key.
Jim
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