Application method and system of digital certificate

The invention discloses an application method and system of a digital certificate. The method comprises a step of establishing a safety channel between a trusted service management TSM server and a mobile terminal, wherein the TSM server issues the digital certificate to the mobile terminal through the safety channel; and the mobile terminal deploys the digital certificate in a TEE in a trusted application form, thereby providing corresponding data processing service. Through the method and system disclosed by the invention, the safety channel can be established and various commands can be generated based on the safety channel, an optimized personalized command and a personalized process are defined, the personalization of the SE-free digital certificate based on TEE can be safely and effectively realized by adopting the safe and efficient safety channel protocol, the security required by the service can be guaranteed, and the cost of purchasing additional hardware by a user can be saved. 本发明公开了种数字证书的应用方法、系统，