Christopher J Olson

US Patent:

7295672, Nov 13, 2007

Filed:

Jul 11, 2003

Appl. No.:

10/617632

Inventors:

Leonard D. Rarick - San Diego CA, US
Christopher H. Olson - Austin TX, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

H04L 9/00

US Classification:

380 42, 380 28, 380 37, 380 43

Abstract:

A method and apparatus for encrypting information. In one embodiment, a method for encrypting information includes obtaining a value A from an array having a plurality of values and determining a value B based on the value A in a first pipeline stage. In a second pipeline stage, a value V may be determined from the value A and the value B. The value V may then be exclusive ORed (XORed) with a data value that forms a portion of the information being encrypted. A first logic unit may include the first pipeline stage, while a second logic unit may include the second pipeline stage. The array may be stored in a plurality of flip-flops in one embodiment, or may be stored in one or more register files in a second embodiment. The method and apparatus may be used for decrypting information as well.

US Patent:

7443981, Oct 28, 2008

Filed:

Oct 1, 2003

Appl. No.:

10/676554

Inventors:

Leonard D. Rarick - San Diego CA, US
Christopher H. Olson - Austin TX, US

Assignee:

Sun Microsystems, Inc - Santa Clara CA

International Classification:

H04K 1/00

US Classification:

380 29

Abstract:

An execution unit adapted to perform at least a portion of the Data Encryption Standard. The execution unit includes a Left Half input; a Key input; and a Table input. The execution unit also includes a first group of transistors configured to receive the Table input, perform a table look-up, and output data. The execution unit further includes a first exclusive-or operator having two inputs and an output. The first exclusive-or operator is configured to receive the Left Half input and the Key input. The execution unit also includes a second exclusive-or operator having two inputs and an output. The second exclusive-or operator is configured to receive the data output by the first group of transistors and to receive the output of the first exclusive-or operator. The execution unit also includes a third exclusive-or operator having two inputs and an output. The third exclusive-or operator is configured to receive the Left Half input and the data output by the first group of transistors.

US Patent:

8073141, Dec 6, 2011

Filed:

Aug 28, 2008

Appl. No.:

12/200792

Inventors:

Leonard D. Rarick - San Diego CA, US
Christopher H. Olson - La Jolla CA, US

Assignee:

Oracle America, Inc. - Redwood Shores CA

International Classification:

H04L 9/00

US Classification:

380 29

Abstract:

An execution unit adapted to perform at least a portion of the Data Encryption Standard. The execution unit includes a Left Half input; a Key input; and a Table input. The execution unit also includes a first group of transistors configured to receive the Table input, perform a table look-up, and output data. The execution unit further includes a first exclusive-or operator having two inputs and an output. The first exclusive-or operator is configured to receive the Left Half input and the Key input. The execution unit also includes a second exclusive-or operator having two inputs and an output. The second exclusive-or operator is configured to receive the data output by the first group of transistors and to receive the output of the first exclusive-or operator. The execution unit also includes a third exclusive-or operator having two inputs and an output. The third exclusive-or operator is configured to receive the Left Half input and the data output by the first group of transistors.

US Patent:

8358780, Jan 22, 2013

Filed:

Nov 7, 2011

Appl. No.:

13/291026

Inventors:

Leonard D. Rarick - San Diego CA, US
Christopher H. Olson - Austin TX, US

Assignee:

Oracle America, Inc. - Redwood Shores CA

International Classification:

H04L 9/00

US Classification:

380 28

Abstract:

Described is an execution unit for performing at least part of the Data Encryption Standard that includes a Left Half input; a Key input; and a Table input, as well as a first group of transistors configured to receive the Table input, perform a table look-up, and output data. The execution unit further includes a first exclusive-or operator having two inputs and an output that is configured to receive the Left Half input and the Key input. The execution unit also includes a second exclusive-or operator having two inputs and an output that is configured to receive the data output by the first group of transistors and to receive the output of the first exclusive-or operator. The execution unit also includes a third exclusive-or operator having two inputs and an output that is configured to receive the Left Half input and the data output by the first group of transistors.