Electronic seal, signature and signature are all based on cryptographic technology, which effectively binds digital certificate, signature key and physical seal image to realize the integrity, authenticity and non-repudiation of various electronic documents.

Seal refers to the company's bronze seal, which is made by CA company and issued by electronic seal.

Electronic signature and signature refer to our post certificate, legal person certificate, etc.

Whether the electronic seal is valid or not depends on three points here: integrity, authenticity and non-repudiation.