Electronic seal of official document refers to the seal applied to electronic official document, which is used to confirm and prove the legitimacy, authenticity and credibility of electronic official document. Compared with the traditional seal, the electronic seal of official documents does not need to rely on time, place and environment, which can guarantee the security of official documents more effectively.

The main ways to realize the electronic seal of official documents are digital certificate and digital signature, in which the digital certificate greatly enhances the credibility of official documents. On the other hand, digital signature uses asymmetric encryption technology to ensure that the document content has not been tampered with or forged.

With the continuous improvement of information technology and digital services, the electronic seal of official documents is being widely used in various fields. The government, enterprises and institutions are also gradually promoting the electronic seal of official documents, which has made great contributions to ensuring information security. In the future, the electronic seal of official documents will continue to be gradually improved to ensure information security for more fields.