Umesh Maheshwari

US Patent:

7430670, Sep 30, 2008

Filed:

Jul 31, 2000

Appl. No.:

09/629546

Inventors:

James J. Horning - Palo Alto CA, US
W. Olin Sibert - Lexington MA, US
Robert E. Tarjan - Princeton NJ, US
Umesh Maheshwari - San Jose CA, US
William G. Horne - Lawrenceville NJ, US
Andrew K. Wright - Monroe Township NJ, US
Lesley R. Matheson - Campbell CA, US
Susan K. Owicki - Palo Alto CA, US

Assignee:

Intertrust Technologies Corp. - Sunnyvale CA

International Classification:

G06F 12/14

US Classification:

713190, 713194

Abstract:

Systems and methods are disclosed for protecting a computer program from unauthorized analysis and modification. Obfuscation transformations can be applied to the computer program's local structure, control graph, and/or data structure to render the program more difficult to understand and/or modify. Tamper-resistance mechanisms can be incorporated into the computer program to detect attempts to tamper with the program's operation. Once an attempt to tamper with the computer program is detected, the computer program reports it to an external agent, ceases normal operation, and/or reverses any modifications made by the attempted tampering. The computer program can also be watermarked to facilitate identification of its owner. The obfuscation, tamper-resistance, and watermarking transformations can be applied to the computer program's source code, object code, or executable image.

US Patent:

7504969, Mar 17, 2009

Filed:

Jul 11, 2006

Appl. No.:

11/484881

Inventors:

R. Hugo Patterson - Mountain View CA, US
Umesh Maheshwari - San Jose CA, US

Assignee:

Data Domain, Inc. - Santa Clara CA

International Classification:

H03M 7/34

US Classification:

341 51, 341 50

Abstract:

Selecting a segment boundary comprises determining a segmentation window is determined and computing a plurality of values associated with candidate boundaries within the segmentation window. Selecting a segment boundary further comprises selecting one of the candidate boundaries based at least in part on a comparison between two or more of the computed values and determining a boundary within the segmentation window.

US Patent:

7562186, Jul 14, 2009

Filed:

Apr 11, 2006

Appl. No.:

11/402631

Inventors:

Kai Li - Princeton NJ, US
Ming Benjamin Zhu - Palo Alto CA, US
Umesh Maheshwari - San Jose CA, US
Zheng Yang - Sunnyvale CA, US

Assignee:

Data Domain, Inc. - Santa Clara CA

International Classification:

G06F 13/00

US Classification:

711112, 711156, 711162, 382173

Abstract:

Storage using resemblance of data segments is disclosed. It is determined that a new segment resembles a prior stored segment. The prior stored segment comprises a segment stored previously from any location in an input data stream. A delta between the new segment and the prior stored segment is determined. A representation of the new segment based at least in part on the delta is stored.

US Patent:

7624335, Nov 24, 2009

Filed:

Oct 13, 2005

Appl. No.:

11/251627

Inventors:

Umesh Maheshwari - San Jose CA, US
R. Hugo Patterson - Mountain View CA, US

Assignee:

Data Domain, Inc. - Santa Clara CA

International Classification:

G06F 11/00

US Classification:

714807, 714 6, 714 15, 714758, 714805

Abstract:

Verifying a file in a system with duplicate segment elimination is disclosed. A data file is segmented into a plurality of distinct data segments, and a checksum is computed for each of the plurality of distinct data segments. A constructed data file checksum is constructed from the checksums of each of the plurality of distinct data segments, and, it is determined if a checksum of the data file is the same as the constructed data file checksum.

US Patent:

7681240, Mar 16, 2010

Filed:

Jan 23, 2006

Appl. No.:

11/338187

Inventors:

Umesh Maheshwari - San Jose CA, US
Radek Vingralek - Belmont CA, US
W. Olin Sibert - Lexington MA, US

Assignee:

Intertrust Technologies Corporation - Sunnyvale CA

International Classification:

H04L 9/32

US Classification:

726 26, 713189, 713193

Abstract:

Systems and methods are disclosed for providing a trusted database system that leverages a small amount of trusted storage to secure a larger amount of untrusted storage. Data are encrypted and validated to prevent unauthorized modification or access. Encryption and hashing are integrated with a low-level data model in which data and meta-data are secured uniformly. Synergies between data validation and log-structured storage are exploited.

US Patent:

7739511, Jun 15, 2010

Filed:

Oct 29, 2007

Appl. No.:

11/927220

Inventors:

William G. Horne - Lawrenceville NJ, US
Umesh Maheshwari - San Jose CA, US
Robert E. Tarjan - Princeton NJ, US
James J. Horning - Palo Alto CA, US
W. Olin Sibert - Lexington MA, US
Lesley R. Matheson - Campbell CA, US
Andrew K. Wright - Monroe Township NJ, US
Susan S. Owicki - Palo Alto CA, US

Assignee:

Intertrust Technologies Corp. - Sunnyvale CA

International Classification:

H04L 9/32
B42D 15/00
H04N 1/40

US Classification:

713176, 283113, 358 328

Abstract:

Systems and methods are disclosed for embedding information in software and/or other electronic content such that the information is difficult for an unauthorized party to detect, remove, insert, forge, and/or corrupt. The embedded information can be used to protect electronic content by identifying the content's source, thus enabling unauthorized copies or derivatives to be reliably traced, and thus facilitating effective legal recourse by the content owner. Systems and methods are also disclosed for protecting, detecting, removing, and decoding information embedded in electronic content, and for using the embedded information to protect software or other media from unauthorized analysis, attack, and/or modification.

US Patent:

7752455, Jul 6, 2010

Filed:

Jan 25, 2006

Appl. No.:

11/340326

Inventors:

Umesh Maheshwari - San Jose CA, US
Radek Vingralek - Belmont CA, US
W. Olin Sibert - Lexington MA, US

Assignee:

Intertust Technologies Corp. - Sunnyvale CA

International Classification:

H04L 9/32

US Classification:

713189, 713193

Abstract:

Systems and methods are disclosed for providing a trusted database system that leverages a small amount of trusted storage to secure a larger amount of untrusted storage. Data are encrypted and validated to prevent unauthorized modification or access. Encryption and hashing are integrated with a low-level data model in which data and meta-data are secured uniformly. Synergies between data validation and log-structured storage are exploited.

US Patent:

7770016, Aug 3, 2010

Filed:

Apr 19, 2007

Appl. No.:

11/737428

Inventors:

William G. Horne - Lawrenceville NJ, US
Umesh Maheshwari - San Jose CA, US
Robert E. Tarjan - Princeton NJ, US
James J. Horning - Palo Alto CA, US
W. Olin Sibert - Lexington MA, US
Lesley R. Matheson - Campbell CA, US
Andrew K. Wright - Monroe Township NJ, US
Susan S. Owicki - Palo Alto CA, US

Assignee:

Intertrust Technologies Corporation - Sunnyvale CA

International Classification:

H04L 9/32
G06F 11/30
G06F 12/14

US Classification:

713176, 713189

Abstract:

Systems and methods are disclosed for embedding information in software and/or other electronic content such that the information is difficult for an unauthorized party to detect, remove, insert, forge, and/or corrupt. The embedded information can be used to protect electronic content by identifying the content's source, thus enabling unauthorized copies or derivatives to be reliably traced, and thus facilitating effective legal recourse by the content owner. Systems and methods are also disclosed for protecting, detecting, removing, and decoding information embedded in electronic content, and for using the embedded information to protect software or other media from unauthorized analysis, attack, and/or modification.