Program development method, program development supporting system, and program installation method

• US 8,190,912 B2
• Filed: 07/09/2008
• Issued: 05/29/2012
• Est. Priority Date: 07/24/2002
• Status: Active Grant

• Current Assignee: Panasonic Semiconductor Solutions Co., Ltd. (Winbond Electronics Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Fujiwara, Makoto, Nemoto, Yusuke, Yasui, Junichi, Maeda, Takuji, Ito, Takayuki, Yamada, Yasushi, Inoue, Shinji
• Primary Examiner(s): LEMMA, SAMSON B
• Application Number:
  US12/170,160
• Publication Number:
  US 20090037721A1
• Time in Patent Office: 1,420 Days
• Field of Search: 713/191, 713/2, 713/189, 713/193, 716/117, 380/277
• US Class Current: 713/191
• CPC Class Codes: G06F 21/575 Secure boot
• CPC Class Codes: G06F 21/72 in cryptographic circuits
• CPC Class Codes: G06F 2221/2105 Dual mode as a secondary aspect
• CPC Class Codes: G06F 8/60 Software deployment

Abstract

An development environment of a high security level is provided for a key-installed system. Development of a program for a system having an LSI device which includes a secure memory is performed by providing another LSI device having the same structure and setting the provided LSI device to a development mode which is different from a product operation mode. Alternatively, the provided LSI device is set to an administrator mode to perform development and encryption of a key-generation program. The LSI device is set to a key-generation mode to execute the encrypted key-generation program, thereby generating various keys.

Claims

1. An information processing apparatus,

wherein the information processing apparatus has as operation mode, an installation processing mode and a product operation mode, the installation processing mode being a mode in which conversion information required for boot-up of the product operation mode is generated by converting predetermined information, and the product operation mode being a mode in which the information processing apparatus is booted up using the conversion information,

wherein the information processing apparatus comprises:

a storage device for storing the predetermined information;

a reading section for reading out the predetermined information from the storage device;

a conversion section for converting the predetermined information to generate the conversion information;

a writing section for writing the conversion information generated by the conversion section into the storage device;

a boot-up section for booting up the information processing apparatus using the conversion information stored in the storage device; and

a mode control section for making the reading section, the writing section and the conversion section work when the information processing apparatus in the installation processing mode is powered on, while making the boot-up section work when the information processing apparatus in the product operation mode is powered on.

2. The information processing apparatus of claim 1, wherein the conversion section uses key information for converting the predetermined information,

wherein the information processing apparatus further comprises a key storage section for storing the key information, and

wherein the key storage section stores the key information in a state protected against access from outside of the information processing apparatus.

3. The information processing apparatus of claim 1, further comprises a mode setting section for setting the information processing apparatus in the product operation mode when writing the conversion information by the writing section is completed.

4. The information processing apparatus of claim 3, wherein the mode setting section comprises:

a mode storage part for storing mode information indicating whether the operation mode of the information processing apparatus is the product operation mode or not; and

a mode updating part for updating the mode information into information indicating that the operation mode of the information processing apparatus is the product operation mode when writing the conversion information by the writing section is completed.

5. The information processing apparatus of claim 4, wherein the mode storage part is a secure memory provided in the information processing apparatus.

6. The information processing apparatus of claim 1, further comprises a deleting section for deleting the predetermined information in the storage device when writing the conversion information by the writing section is completed.