Implementation of a hybrid cryptosystem ECC-AES

Abstract

This project aims to create an innovative hybrid cryptosystem by leveraging the strengths of both symmetric and asymmetric encryption techniques. Our approach combines the speed of the Advanced Encryption Standard (AES) in Cipher Block Chaining (CBC) mode for data encryption with the robust security of Elliptic Curve Cryptography (ECC), specifically the NIST P-256 curve, for secure key exchange using the Elliptic Curve Diffie-Hellman (ECDH) protocol . Our cryptosystem overcomes the limitations of current cryptographic systems by offering both speed and security. Comprehensive tests have been carried out to evaluate the performance of our hybrid system compared to other cryptographic approaches. These tests measured the execution time of encryption and decryption processes on different data sizes, as well as the time needed to generate keys. The results have demonstrated the remarkable efficiency of our cryptosystem in terms of speed. In order to validate the proposed system in terms of security, extensive tests have been carried out to assess its resilience to various types of attacks