Storing encrypted and/or compressed system context information when entering a low-power state

• US 7,210,045 B2
• Filed: 08/19/2003
• Issued: 04/24/2007
• Est. Priority Date: 08/19/2003
• Status: Active Grant

• Current Assignee: Tahoe Research Limited (f/k/a Learndale Limited) (Vector Capital Corporation)
• Original Assignee: Intel Corporation
• Inventors: Dunstan, Robert A.
• Primary Examiner(s): Peeso; Thomas R.
• Application Number:
  US10/643,848
• Publication Number:
  US 20050044433A1
• Time in Patent Office: 1,344 Days
• Field of Search: 713/300, 713320-324, 713/168
• US Class Current: 713/300
• CPC Class Codes: G06F 21/62 Protecting access to data via a platform, e.g. using keys or access control rules
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: H04N 21/4331 Caching operations, e.g. of an advertisement for later insertion during playback
• CPC Class Codes: H04N 21/4353 involving decryption of additional data arrangements using cryptography for the use of broadcast information or broadcast-related information H04H60/23
• CPC Class Codes: H04N 21/4432 Powering on the client, e.g. bootstrap loading using setup parameters being stored locally or received from the server resetting in general G06F1/14; program loading or initiating in general G06F9/445; bootstrapping in general G06F9/4401; secure boots of computer platforms G06F21/57
• CPC Class Codes: H04N 21/4436 Power management, e.g. shutting down unused components of the receiver power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418

Abstract

According to some embodiments, encrypted and/or compressed system context information is stored when entering a low-power state.

Claims

1. A method, comprising:

determining that a system is to enter a low-power state;

encrypting system context information; and

saving the encrypted system context information on a non-volatile storage device, wherein the system context information is associated with at least one of;

(i) an operating system image, or (ii) a memory image.

2. A method, comprising:

determining that a system is to enter a low-power state;

encrypting system context information; and

saving the encrypted system context information on a non-volatile storage device, wherein the low-power state is associated with an advanced configuration and power interface sleep state.

3. A method, comprising:

determining that a system is to enter a low-power state;

encrypting system context information; and

saving the encrypted system context information on a non-volatile storage device, wherein the non-volatile storage device comprises at least one of;

(i) a hard disk drive, (ii) a hard disk drive partition, (iii) a flash memory unit, (iv) a random access memory having a battery, or (v) a network device.

4. A method, comprising:

determining that a system is to enter a low-power state;

encrypting system context information; and

saving the encrypted system context information on a non-volatile storage device, wherein the system includes a processor and comprises at least one of;

(i) a desktop personal computer;

(ii) a mobile system, (iii) a workstation, (iv) a server, (v) a set top box, or (vi) a game system.

5. A method, comprising:

determining that a system is to enter a low-power state;

encrypting system context information; and

saving the encrypted system context information on a non-volatile storage device, wherein said encrypting is performed in accordance with at least one of;

(i) a system identifier, (ii) a user identifier, (iii) a processor identifier, or (iv) trusted platform module information.

6. The method of claim 5, wherein said encrypting is performed by at least one of:

(i) a software application, (ii) a hardware device, or (iii) a stream encryption engine.

7. A method, comprising:

determining that a system is to enter a low-power state;

encrypting system context information; and

saving the encrypted system context information on a non-volatile storage device, wherein an operating system writes the system context information into a volatile memory device and said encrypting and saving are arranged by another device that accesses the system context information from the volatile memory device, wherein the other device is associated with at least one of;

(i) a basic input/output system, or (ii) an encryption engine associated with a chipset.

8. A method, comprising:

determining that a system has entered an advanced configuration and power interface S3 sleep state; and

arranging for system context information stored in volatile memory to be encrypted and saved in a non-volatile storage device.

9. The method of claim 8, further comprising:

arranging for the system context information to be compressed before being encrypted.

10. An apparatus, comprising:

a decision unit to determine that a system is to enter a low-power state; and

an encryption engine to encrypt system context information and arrange for the encrypted system context information to be saved on a non-volatile storage device, wherein the system context information is associated with at least one of;

(i) an operating system image, or (ii) a memory image.

11. The apparatus of claim 10, further comprising:

a compression engine to compress the system context information before it is encrypted.

12. An apparatus, comprising:

a storage medium having stored thereon instructions that when executed by a machine result in the following;

determining that a system is to enter a low-power state,

encrypting system context information, and

saving the encrypted system context information on a non-volatile storage device, wherein the system context information is associated with at least one of;

(i) an operating system image, or (ii) a memory image.

13. The apparatus of claim 12, wherein execution of the instructions further results in:

compressing the system context information before it is encrypted.

14. A method, comprising:

determining that a system is to enter a low-power state;

compressing system context information; and

saving the compressed system context information on storage device, wherein the system context information is associated with at least one of;

(i) an operating system image, or (ii) a memory image.

15. The method of claim 14, wherein the compressed system context information is saved to a non-volatile storage device.

16. The method of claim 14, further comprising:

arranging for the system to enter the low-power state after the compressed system context information is saved.

17. The method of claim 14, further comprising:

retrieving the compressed system context information;

uncompressing the compressed system context information; and

arranging for the system to enter a higher-power state in accordance with the system context information.

18. A computer system, comprising:

a hard disk drive; and

an apparatus, including;

a decision unit to determine that a system is to enter a low-power state, and

an encryption engine to encrypt system context information and arrange for the encrypted system context information to be saved on a non-volatile storage device, wherein the system context information is associated with at least one of;

(i) an operating system image, or (ii) a memory image.

19. The computer system of claim 18, wherein the apparatus further comprises:

a compression engine to compress the system context information before it is encrypted.