Research on Digital Signature System Based on RSA
Wei Yan-n · Journal of North China Institute of Aerospace Engineering · 2014
Digital signature can solve the problems of forgery,denial,pretending and tampering,which is one of the means to ensure the network information security. The basic principle of RSA algorithm and the composition of the digital signature system are specified. And digital signature system based on RSA is realized,which includes the generation of RSA key,digital signature creation and digital signature verification. In order to accelerate the speed of digital signature,hash function is used in signature file and a fixed length message digest is calculated in sender. Then the sender encrypts the message digest with the private key to get a digital signature,it is sent to receiver with signature file. Digital signature is decrypted using sender's public key to generate message digest in receiver,another message digest is calculated using the same hash function for received file. If the digests are the same,then the file was not tampered enroute.Compared with other digital signature system,the digital signature based on RSA has higher safety and reliability.