According to the provisions of the Electronic Signature Law, the judicial organ can judge that four conditions are met at the same time, which can be regarded as a legal and reliable electronic signature:

1. When electronic signature production data is used for electronic signature, it belongs exclusively to the electronic signer;

2. When signing, the electronic signature production data is only controlled by the electronic signer;

3. Any changes to the electronic signature after signing can be found;

Any changes in the content and form of the data message after signing can be found.

If the electronic signature signed by the parties needs to be authenticated by a third party (judicial institution), the legally established electronic authentication service provider shall provide authentication services. Electronic signature refers to the data contained in the data message in electronic form and accompanied by data used to identify the identity of the signer and show that the signer approves its content. It is to sign the electronic form of electronic documents through cryptographic technology. Different from handwritten signature, similar to handwritten signature or seal.