Electronic contract encryption and decryption method and system based on bidirectional authentication

• Main Authors: BAI YUNFEI, HU DADAO, GUO BING, ZHANG JIANXIONG, JIANG YUMING
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention provides an electronic contract encryption and decryption method and system based on bidirectional authentication. The method comprises the following steps: a client sends a certificate application to a bidding service mechanism; after verifying that the client is legal, the bidding service institution sends a certificate application to the CA and key management platform, signs a certificate data packet returned by the CA and key management platform by using a signature private key, and sends the signed certificate data packet, a signature value and a signature certificate of the bidding service institution to the client; after the client verifies the validity of the signature certificate of the bidding service institution, the client unlocks the digital envelope in the certificate data packet by using the signature private key to obtain the temporary symmetric key, signs and encrypts the electronic contract by using the own signature private key and the temporary symmetric key, and sends the en