INSTRUCTIONS FOR PERFORMING DATA ENCRYPTION STANDARD (DES) COMPUTATIONS USING GENERAL-PURPOSE REGISTERS

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20100329450A1
SERIAL NO

12494481

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

Some embodiments of the present invention provide a processor, which includes a set of general-purpose registers and at least one execution unit. Each general-purpose register in the set of general-purpose registers is at least 64 bits wide, and the execution unit supports one or more Data Encryption Standard (DES) instructions. Specifically, the execution unit may support a permutation-rotation instruction for performing DES permutation operations and DES rotation operations. The execution unit may also support a round instruction to perform a DES round operation. Since the DES instructions use general-purpose registers instead of special-purpose registers to perform DES-specific operations, the processor's circuit complexity and area are reduced. Furthermore, in some embodiments, since the DES instructions require at most two operands, the number of bits required to specify the location of the operands are reduced, thereby enabling a larger number of instructions to be supported by the processor.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
SUN MICROSYSTEMS INC4150 NETWORK CIRCLE SANTA CLARA CA 95054

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Grohoski, Gregory F Bee Cave, US 49 1398
Olson, Christopher H Austin, US 66 960
Rarick, Leonard D San Jose, US 38 297

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation