MysteryTwister C3
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Level III Challenges (72)

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

ORYX Stream Cipher — Part 4c

[stamp-17] - 0 users already solved this challenge, 1 is working on it.
 
 
 

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 20:39
Maximum number of attempts for this challenge: 15

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