Which authentication method is the easiest for companies to sign electronic contracts?

When signing an electronic contract, the simplest authentication method is to use a digital certificate. Digital certificate is an electronic certificate issued by a third party organization (such as authoritative CA organization) to prove the identity and authentication information of an individual or organization. By using digital certificates, the authenticity and legality of the identity of the contract signer can be ensured. When signing an electronic contract, you only need to use a digital certificate to sign and authenticate the contract, without additional complicated steps or audit process.