An Improved RSA Signature Algorithm Based on Complex Numeric Operation Function

Digital signature can be realized by using RSA algorithm. RSA is widely used in public-key cryptosystem. But running this algorithm needs lots of time and memory. This paper proposes a RSA signature algorithm to fit for the devices with low computational power. The new signature algorithm is based on complex numeric operation function. This paper expounds the fundamental principles of RSA algorithm. The realization of RSA algorithm includes the generation of RSA cryptographic key and the encryption and decryption of data. By using RSA algorithm, we can use the private key of the sender to sign the plaintext and the public key of the receiver to encrypt. For the receiver, he can use his private key to decrypt and the public key of the sender to verify the signature.