[A51] Bit position , table structure and gpu in A51 tables
fritchkornia at keemail.me
fritchkornia at keemail.me
Fri Mar 18 10:33:45 CET 2016
Hi
I have a few questions regarding the A5/1 tables. I tought after a quick
reading that the plaintext equivalent of the tables was the LFSRs state
after 122 clocking and the output the 64 first bit of keystream (after 64
further clocking) with a simple reduction function output = new plaintext
However while testing there is a Bit position that poped up . Does it mean
that the compute function differ for each steps or is it just different in
each tables ?
IS there a simple guide to understand the table structure somehow .
Finally what is the purpose of the GPU when finding new KC ? Is it just for
the compute/reduction step ?
Best Regards
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