Geodesic
Parallel decomposition of nonautonomous 2-linear shift registers
Matematičeskie voprosy kriptografii, Tome 2 (2011) no. 3, pp. 5-29 Cet article a éte moissonné depuis la source Math-Net.Ru

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A variant of decomposition of nonautonomous 2-linear shift register over the Galois field is considered. It is shown that a nonautonomous 2-linear shift register over the finite field may be represented as a parallel system of clock-controlled shift registers. By means of this construction and the meet-in-the-middle attack the estimate of the cryptographic security of the register considered is lowered considerably. 
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O. A. Kozlitin. Parallel decomposition of nonautonomous 2-linear shift registers. Matematičeskie voprosy kriptografii, Tome 2 (2011) no. 3, pp. 5-29. http://geodesic.mathdoc.fr/item/MVK_2011_2_3_a0/

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