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#1 2017-05-08 09:29:59
- iceman
- Administrator
- Registered: 2013-04-25
- Posts: 9,537
- Website
AUT64 algo used on Temic e5561?
Have someone heard of AUT64 crypto algo and its implementation?
Temic e5561, 125Khz,
AUT64 is a 64bit block cipher.
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#2 2017-05-08 09:56:35
- Onisan
- Contributor
- From: London
- Registered: 2016-07-18
- Posts: 88
Re: AUT64 algo used on Temic e5561?
Didn't Kasper and Oswald discuss it in their paper "Lock It and Still Lose It" way back when?
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#3 2017-05-08 10:13:10
- iceman
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- Registered: 2013-04-25
- Posts: 9,537
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Re: AUT64 algo used on Temic e5561?
Cool didn't remember that one.
VW-2, VW-3 uses AUT64 with 12 rounds, and starting from page 934 mentions AUT64. ref: https://www.usenix.org/system/files/con … garcia.pdf
Orginal crypto states 8-24 rounds.
This means that the same AUT64 key is stored in millions of ECUs and RKE remotes,
without any key diversification being employed at all.
...
the global AUT64 masterkeys for VW-2 and VW-3 are different, but both can be extracted from the ECU firmware
and possibly from the μC in the remotecontrol as well
VW-4 uses XTEA.
e5561 datasheet explains AUT64 also. ref http://media.digikey.com/pdf/Data%20She … /E5561.pdf
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#4 2019-03-07 15:58:56
- iceman
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- Registered: 2013-04-25
- Posts: 9,537
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Re: AUT64 algo used on Temic e5561?
Found another paper,
https://tches.iacr.org/index.php/TCHES/ … ew/874/826
by
Christopher Hicks
Flavio D. Garcia (familiar name)
David Oswald (is this one to Chaos brothers?)
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