Generating a strong key for a stream cipher systems based on permutation networks

الملخص EN

The choice of binary Pseudonoise (PN) sequences with specific properties, having long period high complexity, randomness, minimum cross and auto- correlation which are essential for some communication systems.

In this research a nonlinear PN generator is introduced .

It consists of a combination of basic components like Linear Feedback Shift Register (LFSR), β-element which is a type of RxR crossbar switches.

The period and complexity of a sequence which are generated by the proposed generator are computed and the randomness properties of these sequences are measured by well-known randomness tests.