LF Idteck - unfinished

[iceman1001]

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]

Which encryption works on 32bits? I've only found skip32 as lesser version of skipjack

[iceman1001]

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

[iceman1001]

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]

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