Method and device for digital contract signature, electronic equipment and storage medium

• Main Authors: SHI CONGHUI, HUANG WEIXIANG, YANG CHUNQUAN, LIU QINGZHONG, ZENG XIAOJIAN
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention provides a digital contract signature method and device, electronic equipment and a storage medium, and relates to the technical field of network security. The method comprises the following steps: receiving an encrypted digital contract sent by a first server; decrypting the encrypted digital contract by adopting a private key locally stored at the second SIM card end to obtain decrypted meta-information and an encrypted file decrypted for the first time; sending the target signer information to a first server; under the condition that the first server confirms that the target signer information is matched with the signer information of the second SIM card end associated with the encrypted digital contract, performing secondary decryption on the encrypted file subjected to the primary decryption by adopting the symmetric encryption key to obtain a to-be-signed file; and signing the to-be-signed file, encrypting the signed file by using the symmetric encryption key, and sending the signed file t