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. Simply put, it is an electronic signature realized by technical means, not a digital image with a written signature.

The legal definition of electronic signature is that a reliable electronic signature has the same legal effect as a handwritten signature or seal. According to the provisions of the Electronic Signature Law, the main functions of electronic signature are as follows:

1. The identity of the signatory of the electronic contract is confirmed and its authenticity can be recognized.

2. Explain that the signing party recognizes the contents of the contract, and it can be found if it is tampered with.

3. The whole process of signing the contract will be recorded, and the electronic signature will be used to be responsible for the integrity and correctness of the contract.

The electronic contract signing platform of the signing shield relies on national laws, follows the provisions of the contract law and the electronic signature law, and uses reliable electronic signatures to ensure its legal effect from three aspects:

1. The digital certificate issued by CA Certification Center, a national authority, is checked and compared by the eID Certification System of the Ministry of Public Security to ensure the authenticity and validity of the identities of both signatories.

2. Using blockchain technology, the content data signed by the contract is wound, and the hash value is solidified, so that it is easy to identify whether the file has been tampered with.

3. Time stamp technology, accurately record information such as signature time and save evidence chain.

It can be seen that the role of electronic signature is mainly reflected in two aspects. One is to confirm the identity of the signatory like the traditional handwritten signature or seal, and the other is to ensure the safety and compliance in the process of signing the contract.

The electronic contract with electronic signature effectively avoids the risk of counterfeiting and forgery caused by handwritten signature or seal. At the same time, compared with paper contracts, electronic contracts improve the signing efficiency, reduce the signing cost and are more convenient to manage.