Answer: The function of electronic signature: ① Evidentiality-the undeniable and integrity of electronic documents; ② Expression of the intention of the signer of electronic signature-confirmation of the role of the counterpart; ③ Security of electronic documents-cannot be tampered with or intercepted.

The functions of traditional signature are: ① to ensure the non-repudiation and integrity of documents; (2) to ensure the credibility and prudence of documents; ③ Ensure the expression of the signer's consent-confirm the true identity of the other party; Prove the fact that someone is at a certain time and place.