System and method of protecting data on a communication device

摘要

A system and method of protecting data on a communication device are provided. Data received when the communication device is in a first operational state is encrypted using a first cryptographic key and algorithm. When the communication device is in a second operational state, received data is encrypted using a second cryptographic key and algorithm. Received data is stored on the communication device in encrypted form.

主权项

1. A method of protecting data on a mobile device, the method comprising:
prior to any storage of data received at the mobile device in a non-volatile memory of the mobile device:
encrypting the data received at the mobile device using a first cryptographic key if the first cryptographic key is accessible; andencrypting the received data using a second cryptographic key if the first cryptographic key is not accessible; and storing the received data in encrypted form in the non-volatile memory, wherein, in the event that the received data is related to existing data in encrypted form stored in the non-volatile memory, storing the received data in encrypted form comprises appending the received data in encrypted form to the existing data in encrypted form.