MysteryTwister C3
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Level III Challenges (73)

All challenges in Level III, ordered by date posted (the most recent appear first).

ORYX Stream Cipher — Part 4b

[stamp-16] - 2 users already solved this challenge.
 
 
 

The ORYX stream cipher consists of three 32-bit LFSRs X, A, B which are shifted differently depending on some bits in the LFSR X. The key stream is a combination of the highest 8 bits of each of the three LFSRs. It is neither feasible nor necessary to search the whole 96-bit key space, there are more efficient methods!
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Published on: 2014-04-14 20:38
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#2) Achieved points (Global score) y-m-d - h:m:s

S Combes (jerva) 14283 (242717) 2015-03-10 22:57:57
George Lasry (george4096) 13594 (399565) 2017-06-27 11:31:13
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