Challenge "ORYX Stream Cipher — Part 4b" ¶
By: admin on April 14, 2014, 8:38 p.m.
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!