Protect legitimate rights and interests. Xintianxing digital certificate is the most widely used and perfect electronic authentication service brand under BJCA. Using it can solve the security problems in e-government/business applications, protect the legitimate rights and interests of users in electronic transactions, and meet the requirements of electronic signature law for trusted data messages. Xintianxing is an authoritative, legal, safe and convenient third-party electronic authentication service product provided by Beijing Digital Certificate Certification Center (BJCA) for e-commerce and e-government.