Validating sensitive data from an application processor to modem processor

摘要

An electronic circuit 120 includes a more-secure processor (600) having hardware based security (138) for storing data. A less-secure processor (200) eventually utilizes the data. By a data transfer request-response arrangement (2010, 2050, 2070, 2090) between the more-secure processor (600) and the less-secure processor (200), the more-secure processor (600) confers greater security of the data on the less-secure processor (200). A manufacturing process makes a handheld device (110) having a storage space (222), a less-secure processor (200) for executing modem software and a more-secure processor (600) having a protected application (2090) and a secure storage (2210). A manufacturing process involves generating a per-device private key and public key pair, storing the private key in a secure storage (2210) where it can be accessed by the protected application (2090), combining the public key with the modem software to produce a combined software, signing the combined software; and storing the signed combined software into the storage space (222). Other processes of manufacture, processes of operation, circuits, devices, wireless and wireline communications products, wireless handsets and systems are disclosed and claimed.

主权项

1. A process of operating a mobile device comprising:
A. validating sensitive data stored in a more secure application processor using hardware based security; B. sending a request for part of the sensitive data from a less secure modem processor to the application processor through a secure coupling; C. receiving the request in the application processor; D. passing the request to driver software in the application processor; E. passing the request from the driver software to protected application software that operates in protected and secure hardware in the application processor; F. validating the request for the sensitive data in the protected application software; and G. sending the validated sensitive data through the driver software, and the secure coupling from the application processor to the modem processor.