Digital signature method for escrowing private key of mobile terminal

Abstract

The invention discloses a digital signature method for escrowing the private key of a mobile terminal. The mobile terminal needs to provide digital signature service in the development of e-government application, however, at present, the mobile terminal is lack of a safety condition providing a private key saving digital signature, the private key is likely to be stolen by a hacker at the mobile terminal, so that the digital signature cannot be realized directly by the mobile terminal. The invention provides a digital signature technology for the mobile terminal. The digital signature technology comprises the mobile terminal, a signature server and a KMC server cipher machine. The signature server is responsible for managing the signature private key of the user, all private keys of the system are encrypted and then saved in the cipher machine, the encrypted user' private key is mastered by the user, and the cipher machine is only communicated with the signature server. When a certificate is downloaded by a user, the terminal application packs a Hash value in digital signature and user identity information together to form digital signature request message, the digital signature request message is sent to the signature server through a short message, after the user request validation is passed, the cipher machine is called, and after the user' private key is digitally signed, the result is returned to the user to complete the digital signature process.

Description

technical field [0001] The invention relates to the technical field of information-based mobile office, in particular to the technology of digital content security on a mobile terminal. Provided is a method for implementing a digital signature for an application on a mobile terminal. Background technique [0002] A smart mobile terminal is a multifunctional device that not only has a communication function, but also can conduct e-commerce, mobile office and other services after installing an application program. As a mobile device, smart mobile terminal equipment has the characteristics of "small and light" and "convenient communication", and users mostly operate the device through touch. Small and lightweight, mobile devices generally do not perform a large number of complex calculations, and the peripheral interfaces of the devices are simple, and generally interact with other devices through wireless means. With more and more smart mobile terminals participating in vari...

AI Technical Summary

Problems solved by technology

Although there are USB password keys with Bluetooth interface or audio interface at present, the above-mentioned equipment still has the following disadvantages: due to the openness of the Bluetooth protocol, the security of the communication between the Bluetooth USB password key device and the host cannot be guaranteed; The password key device cannot solve the compatibility problem of the audio interface between different mobile terminals

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