What is the significance of CA in social security?

Certificate Authority (CA), also known as e-commerce certification center, is the authority responsible for issuing and managing digital certificates. As a trusted third party in e-commerce transactions, CA is responsible for verifying the legitimacy of public keys in public key systems.

The CA Center issues a digital certificate to each user who uses the public key. The function of digital certificate is to prove that the user listed in the certificate legally owns the public key listed in the certificate. The digital signature of CA makes it impossible for attackers to forge and tamper with certificates. In SET transaction, CA not only issues certificates to cardholders and merchants, but also issues certificates to banks and gateways that collect money.

In order to ensure the security, authenticity, reliability, integrity and non-repudiation of information transmitted between users on the Internet, it is necessary not only to verify the authenticity of users' identities, but also to have an authoritative, just and unique institution responsible for issuing and managing e-commerce security certificates that meet the domestic and international standards for secure electronic transactions, and for managing digital certificates required by all individuals participating in online transactions, so it is the core link of secure electronic transactions.