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LF Idteck - unfinished #66

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iceman1001 opened this issue Jan 11, 2017 · 4 comments
Open

LF Idteck - unfinished #66

iceman1001 opened this issue Jan 11, 2017 · 4 comments
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enhancement help wanted

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@iceman1001
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Added a demod for PSK1, Idteck tags. 64bits / 2blocks.
First block is same, and used as preamble.
Second block is unknown. It looks encrypted, but 32bits?
Or a major scramble algo.
@iceman1001
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Which encryption works on 32bits? I've only found skip32 as lesser version of skipjack

@iceman1001
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Could also be Grain 128a crypto. It seems to be used with Legic Advant.

@iceman1001
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This paper gives some hope for grain 128a key-recovery. http://eprint.iacr.org/2012/349.pdf

Sidenote, Grain 128a is current used in Legic Advant cards beside AES

@iceman1001
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There is now an known-plaintext mode imp in Hashcat for Skip32. Those guys are something else.
Maybe I should request "Grain 128a" aswell?

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