Quantum asymmetric cryptography with symmetric keys

Comparative Study of Symmetric and Asymmetric Cryptography Techniques

New Symmetric and Asymmetric Quantum Codes

The asymmetric CSS construction is extended to the Hermitian case. New infinite families of quantum symmetric and asymmetric codes are constructed. The codes obtained are shown to have parameters better than those of previous codes. A number of known codes are special cases of the codes given here.

Asymmetric cryptography with S-Boxes

In [12], T. Matsumoto and H. Imai designed an asymmetric cryptosystem, called C∗, for authentication, encryption and signature. This C∗ scheme was broken in [13] due to unexpected algebraic properties. In this paper, we study some new “candidate” asymmetric cryptosystems based on the idea of hiding one or two rounds of small S-box computations with secret functions of degree one or two. The pub...

Fully Homomorphic Encryption Scheme with Symmetric Keys

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A Hybrid Authentication Protocol Using Quantum Entanglement and Symmetric Cryptography

This paper presents a hybrid cryptographic protocol, using quantum and classical resources, for authentication and authorization in a network. One or more trusted servers distribute streams of entangled photons to individual resources that seek to communicate. It is assumed that each resource shares a previously distributed secret key with the trusted server, and that resources can communicate ...