一种改进的RSA-ELGamal密码体制OA

RSA and ELGamal were the most commonly used data security encryption systems.However,recent research has found that the original RSA and ELGamal had several vulnerabilities that made them susceptible to being cracked.Based on enhanced RSA and ELGamal encryption algorithms,a new RSA-ELGamal encryption scheme was proposed.In this cryptographic system,the sender and the receiver shared a set of keys,the shared key was held by the sender,the shared key was introduced into the ELGamal cipher system.The sender encrypted the shared key using the RSA encryption algorithm and encrypted the plaintext using the ElGamal encryption algorithm,and the sender sent the encrypted shared key and ciphertext to the receiver.In the improved RSA-ELGamal cryptosystem,a shared key was introduced to increase the barrier for attackers,which a third party intercepted the shared key through a shared channel,obtained an encrypted shared key instead of the real shared key.This cryptosystem greatly enhanced the security of this system.