| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To update a program while maintaining high security on an LSI (large scale integrated circuit) executing a program encrypted with a unique key. <P>SOLUTION: A system including the secure LSI 1 establishes a communication line with a server 3 (UD1), and receives a shared key encrypted program transmitted from the server 3 and encrypted with a shared key (UD6, UD7). The system then decodes the received shared key encrypted program to generate a plaintext program, further re-encrypts the plaintext program with the unique key and stores it as a new unique key encrypted program in an external memory. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
