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Decrypting a Stream Cipher Based on J?K Flip-Flops
July 1979 (vol. 28 no. 7)
pp. 483-487
F. Rubin, Data Systems Division, IBM Corporation
Pless has proposed a stream cipher based on J?K flip-flops that uses 8 linear shift registers with feedback, having a combined length of 97 bits, 4 J?K flip-flops, and a 4-stage cycling counter. The cipher has 2.54 ? 1051initial states (keys), and generates a presumably pseudorandom stream whose period is 1.52 ? 1029bits. Despite these impressive statistics, it is computation
Index Terms:
stream cipher, Boolean equations, code breaking, cryptography, J?K flip-flop, linear shift register
Citation:
F. Rubin, "Decrypting a Stream Cipher Based on J?K Flip-Flops," IEEE Transactions on Computers, vol. 28, no. 7, pp. 483-487, July 1979, doi:10.1109/TC.1979.1675392
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