Authentication Encryption Method and Encryption System Based on Symmetric Encryption

Abstract

The invention requests protection of an authentication and encryption method and system, which relate to the field of communication security. Combining message recoverable signature and symmetric encryption technology, using the commitment value that only the specified message receiving end can calculate as the session key to encrypt the message, the message receiving end verifies the validity of the message through the recoverable signature, so that it can be realized simultaneously in one logical step encryption and authentication. The key generating unit at the sending end generates a session key at the sending end, the encryption unit encrypts the message to be sent, the receiving end generates a session key at the receiving end, and the decryption unit uses the session key at the receiving end to decrypt the encrypted message. The message generates authentication confirmation information to verify the validity of the message. When a dispute occurs, the message receiver can convert the authenticated encrypted message signature into a common signature, allowing a third party to publicly verify the validity of the signature. The invention has the advantages of high security, low calculation amount and transmission cost, and the like.

Description

technical field [0001] The invention relates to the field of communication security, in particular to an authentication and encryption method in the communication process. Background technique [0002] With the development of computer and communication technology, more and more people use the network to transmit secret information, and the transmission of these secret messages often requires both confidentiality and authentication. The traditional way to realize authentication and confidentiality at the same time is to combine encryption and signature, and adopt the method of "sign first and then encrypt". The calculation and transmission costs of this combination are the sum of signature and encryption, and this traditional method uses public key encryption, the calculation speed is slow and the cost is high. The use of message recoverable signature technology can realize authentication and encryption at the same time at a lower transmission cost. Many scholars at home and...

AI Technical Summary

Problems solved by technology

However, the security of this scheme is not high, and it cannot resist the forgery attack of the message receiver, and after a dispute occurs, the third party cannot publicly verify the signature

Images