Electronic signature is mainly realized by CA authentication technology and encryption technology. The "signature" here needs to meet the following conditions:

1, with identifiable signature-the authoritative CA certification institution established by the state provides identity certification services;

2. Accurate recording of the signing time-the National Time Service Center provides reliable time sources, and the time stamp technology accurately records the signing time;

3. The signature content cannot be tampered with-file transmission and storage security is realized through hash solidification and multiple encryption technologies;

Different from the traditional physical seal mode by comparing the seal (the imprint of the seal on the document), the verification of electronic contract can be quickly judged by checking whether the digital certificate is destroyed when the electronic signature is online (if it is tampered with, it will prompt that the signature is invalid and the digital certificate is destroyed).