A5/1 Implementation in Quantum Cellular Automata

Quantum Cellular Automata (QCA) is an emerging technology at the nanotechnology level. The cryptography is an interesting application of QCA technology which has not been much mentioned yet. Utilizing the QCA technology, we have implemented the A5/1 stream cipher which was the original encryption algorithm for GSM. The implementation of this cryptographic algorithm is accomplished by means of the implementation of its main modules. The main properties of the implemented modules such as latency, area and complexity are discussed in this paper.