Semiconductor integrated circuit and information processing apparatus

• US 20060010328A1
• Filed: 07/07/2005
• Published: 01/12/2006
• Est. Priority Date: 07/07/2004
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Esaka, Seiji, Arisawa, Shigeru
• Granted Patent: US 7,913,307 B2
• Time in Patent Office: Days
• US Class Current: 713/190
• CPC Class Codes: G06F 21/79 in semiconductor storage media, e.g. directly-addressable memories
• CPC Class Codes: G06F 21/85 interconnection devices, e.g. bus-connected or in-line devices

Abstract

A semiconductor integrated circuit includes an encryption unit for generating encrypted data by encrypting data to be stored in an external memory disposed outside the semiconductor integrated circuit, a write unit for writing the encrypted data into the external memory, a reading unit for reading out the encrypted data from the external memory, and a decryption unit for decrypting the readout encrypted data.

Claims

1. A semiconductor integrated circuit comprising:

encrypting means for generating encrypted data by encrypting data to be stored in an external memory disposed outside the semiconductor integrated circuit;

write means for writing the encrypted data into the external memory;

readout means for reading out the encrypted data from the external memory; and

decrypting means for decrypting the readout encrypted data.

2. The semiconductor integrated circuit according to claim 1, wherein,

the encrypting means generates the encrypted data by performing encryption in accordance with a storage location of the data to be stored in the external memory, and

the decrypting means decrypts the readout encrypted data in accordance with the storage location of the encrypted data.

3. The semiconductor integrated circuit according to claim 2, wherein the encrypting means generates the encrypted data by carrying out combination processing for combining the data to be stored in the external memory and address information indicating the storage location of the data.

4. The semiconductor integrated circuit according to claim 3, wherein the combination processing is computing an exclusive-OR for the data and the address information.

5. The semiconductor integrated according to claim 2, wherein the encrypting means generates encrypted data by carrying out data encryption standard encryption after carrying out the combination processing for combining the data to be stored in the external memory and the address information indicating the storage location of the data.

6. An information processing apparatus comprising:

a semiconductor integrated circuit; and

an external memory disposed outside the semiconductor integrated circuit,

wherein the semiconductor integrated circuit includes,

encrypting means for generating encrypted data by encrypting data to be stored in an external memory;

write means for writing the encrypted data into the external memory;

readout means for reading out the encrypted data from the external memory; and

decrypting means for decrypting the readout encrypted data.

7. The information processing apparatus according to claim 6, wherein,

the encrypting means generates the encrypted data by performing encryption in accordance with a storage location of the data to be stored in the external memory, and

the decrypting means decrypts the readout encrypted data in accordance with the storage location of the encrypted data.

8. The information processing apparatus according to claim 7, wherein the encrypting means generates the encrypted data by carrying out combination processing for combining the data to be stored in the external memory and address information indicating the storage location of the data.

9. The information processing apparatus according to claim 8, wherein the combination processing is computing an exclusive-OR for the data and the address information.

10. The information processing apparatus according to claim 7, wherein the encrypting means generates encrypted data by carrying out data encryption standard encryption after carrying out combination processing for combining the data to be stored in the external memory and the address information indicating the storage location of the data.

11. A semiconductor integrated circuit comprising:

readout means for reading out encrypted data from an external memory disposed outside the semiconductor integrated circuit, the external memory storing encrypted data generated by encrypting data to be stored in the external memory; and

decrypting means for decrypting the readout encrypted data.

12. The semiconductor integrated circuit according to claim 11, wherein,

the readout means reads out the encrypted data from a storage location of the encrypted data in the external memory, the encrypted data being generated by encrypting the data to be stored in the external memory in accordance with the storage location, and

the decrypting means decrypts the readout encrypted data in accordance with the storage location of the encrypted data.

13. An information processing apparatus comprising:

a semiconductor integrated circuit; and

an external memory disposed outside the semiconductor integrated circuit,

wherein the semiconductor integrated circuit includes,

readout means for reading out encrypted data from an external memory disposed outside the semiconductor integrated circuit, the external memory storing encrypted data generated by encrypting data to be stored in the external memory; and

decrypting means for decrypting the readout encrypted data.

14. The information processing apparatus according to claim 13, wherein

readout means for reading out encrypted data from an external memory disposed outside the semiconductor integrated circuit, the external memory storing encrypted data generated by encrypting data to be stored in the external memory;

and

the decrypting means decrypts the readout encrypted data in accordance with the storage location of the encrypted data.

15. A semiconductor integrated circuit comprising:

an encryption unit for generating encrypted data by encrypting data to be stored in an external memory disposed outside the semiconductor integrated circuit;

a write unit for writing the encrypted data into the external memory;

a readout unit for reading out the encrypted data from the external memory; and

a decryption unit for decrypting the readout encrypted data.

16. An information processing apparatus comprising:

a semiconductor integrated circuit; and

an external memory disposed outside the semiconductor integrated circuit,

wherein the semiconductor integrated circuit includes,

an encryption unit for generating encrypted data by encrypting data to be stored in an external memory;

a write unit for writing the encrypted data into the external memory;

a readout unit for reading out the encrypted data from the external memory; and

a decryption unit for decrypting the readout encrypted data.

17. A semiconductor integrated circuit comprising:

a readout unit for reading out encrypted data from an external memory disposed outside the semiconductor integrated circuit, the external memory storing encrypted data generated by encrypting data to be stored in the external memory; and

a decryption unit for decrypting the readout encrypted data.

18. An information processing apparatus comprising:

a semiconductor integrated circuit; and

an external memory disposed outside the semiconductor integrated circuit,

wherein the semiconductor integrated circuit includes,

a readout unit for reading out encrypted data from an external memory disposed outside the semiconductor integrated circuit, the external memory storing encrypted data generated by encrypting data to be stored in the external memory; and

a decryption unit for decryption the readout encrypted data.