Patent ID: 7082539
Filing Date: 2006-07-25
Classification: G06F,G11B

Abstract:
1. An information processing apparatus including, a processing device for performing predetermined processing of information, and a bus for interconnecting said processing device and other component devices of said information processing apparatus, wherein said processing device is integrated on a single semiconductor chip, internally generates first key information and second key information, internally encrypts sensitive information inputted from said bus with said generated second key information, internally encrypts said generated second key information with said generated first key information, and outputs said encrypted sensitive information and said encrypted second key information to said bus without outputting said first key information used for encrypting said second key information to said bus, wherein said processing device newly generates different second key information each time sensitive information inputted from said bus is encrypted, wherein said first key information is common to a plurality of said second key information, and wherein said processing device deletes said first key information in said single semiconductor chip if an abnormality is detected, wherein said processing device comprises: