Dynamic Key Based Encryption Scheme in Wireless Communication System

Abstract: Cryptography plays a key function in protecting data, integrity, and confidentiality in the data system. Mainly cryptography is classified as symmetric and asymmetric. The combination of both is known as sessional keys. The dynamic key has the advantage over the sessional key as the session duration problem will not be affecting it and there is no key exchange between the sender and receiver in each session. The dynamic key can be symmetric or asymmetric and the symmetric dynamic key is used in this project. The dynamic key-based phase and permutation encryption scheme are analyzed in 4G technology which uses an OFDM based communication system. The encryption is applied to post-IFFT in OFDM based 4G technology. Performance is analyzed in terms of BER of both dynamic key-based encryption scheme.

Keywords: OFDM, Dynamic Key, Permutation Encryption, Phase Encryption, BER.