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|1. (WO2017166560) METHOD AND SYSTEM FOR INSTALLING PROGRAM USING DIGITAL SIGNATURE|
|Applicants:||FUJIAN LANDI COMMERCIAL EQUIPMENT CO., LTD
|Title:||METHOD AND SYSTEM FOR INSTALLING PROGRAM USING DIGITAL SIGNATURE|
The present invention discloses a method for installing a program using a digital signature. The method comprises: signing an original document to generate a signed document; verifying, by a terminal, whether a working public key certificate and signature data in the signed document are authentic; if the verification is successful, then installing a program according to a profile document in the signed document. According to the method described above, the present invention adds a profile customization on the basis of a custom root certificate to meet the customization requirements of different customers of a same operator, thereby ensuring that a program signed by a customer cannot be downloaded to a terminal of a different customer, and the programs signed by the operator can be downloaded to the terminals of all customers, thereby facilitating maintenance of an operation system.