In this paper, we compute the number of fuzzy subgroups of some classes of non-abeilan groups. Explicit formulas are givenfor dihedral groups $D_{2n}$, quasi-dihedral groups $QD_{2^n}$, generalized quaternion groups $Q_{4n}$ and modular $p$-groups $M_{p^n}$.

This paper introduces skew dihedral group rings and their applications for public-key cryptography. We present a specific ring that is the underlying algebraic platform our cryptographic constructions. then build two-party key exchange protocol an analysis of its security. exploit it to derive agreement protocol, probabilistic scheme, encapsulation mechanism. In addition security constructions,...