2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/146817Conventional Non-Linear Feedback Shift Registers (NLFSRs) use the Fibonacci configuration in which the value of the first bit is updated according to some non-linear feedback function of previous values of other bits, and each remaining bit repeats the value of its previous bit. We show how to transform the feedback function of a Fibonacci NLFSR into several smaller feedback functions of individual bits. Such a transformation reduces the propagation time, thus increasing the speed of pseudo-random sequence generation. The practical significance of the presented technique is that is makes possible increasing the keystream generation speed of any Fibonacci NLFSR-based stream cipher with no penalty in area.14 pages, 4 figures, one reference added, example 4 correctedCryptography and Securitytext