CTI provides medical information security solution services related to electronic identity authentication and software testing. China Test CA introduces electronic authentication services into the hospital information system, and proposes a targeted security solution for the electronic authentication application of the hospital information system. Through the establishment of the whole hospital A unified electronic certification service system and business application security support system, based on PKI security support, adopt digital certificates, digital signatures, digital envelopes and time stamps to ensure the information security of hospital HIS, CIS, LIS, PACS and other business systems. Ensure the authenticity, credibility, legitimacy and validity of electronic medical records, achieve the goal of "trusted identity, credible data, credible behavior, and credible time" of medical informatization, and promote the paperless process of hospital medical records.