Design of Hybrid Encryption Algorithm using AES and RSA for key exchange

Nowadays, security of any confidential data which is being transmitted over a communication channel has become a primary concern. Encryption and decryption techniques are used to achieve confidentiality of sensitive information which is transmitted over channel. Symmetric cryptography faces a key exchange problem between transmitter and receiver. This research paper introduces a novel approach to address the key exchange issue which is encountered in symmetric encryption. In this paper, Advanced Encryption Standard (AES) from symmetric cryptography and Rivest Shaamir Adleman (RSA) algorithms from asymmetric cryptography are analyzed and a new key exchange protocol is developed by combining above said two algorithms to obtain Hybrid cryptography. This protocol achieves 3 major cryptographic primitives: integrity, authentication and confidentiality. The proposed hybrid encryption algorithm is simulated on Xilinx ISE 14.7. The proposed technique gives better security as it overcomes the problem of key exchange.