% Expired Patents = 20.0

Trademarks = 1

Forward Citations = 189

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6 inventors (with patents filed for the assignee):

Jeffrey Hoffstein (5 out of 14 patents)

Joseph H Silverman (5 out of 10 patents)

Jill C Pipher (3 out of 7 patents)

4. William Whyte (1 out of 29 patents)

5. Nicholas A Howgrave-Graham (1 out of 2 patents)

6. Daniel Lieman (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 7308097 - Digital signature and authentication method and apparatus (2007-12-11),

2. 7031468 - Speed enhanced cryptographic method and apparatus (2006-04-18),

3. 6959085 - Secure user identification based on ring homomorphisms (2005-10-25),

4. 6298137 - Ring-based public key cryptosystem method (2001-10-02),

5. 6081597 - Public key cryptosystem method and apparatus (2000-06-27),

Company Overview

Ntru Cryptosystems, Inc. is a leading provider of post-quantum cryptographic solutions. Their innovative technology offers robust encryption and key exchange solutions that are resistant to attacks from quantum computers. With a focus on security and efficiency, Ntru Cryptosystems is shaping the future of cryptography.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

5 Patents

#25 in Acton, MA

#2,894 in Massachusetts

#51,644 in US

Acton, MA, United States of America

Ntru Cryptosystems, Inc.

Forward Citations = 189

6 inventors:

Jeffrey Hoffstein (5 out of 14 patents)

Joseph H Silverman (5 out of 10 patents)

Jill C Pipher (3 out of 7 patents)

4. William Whyte (1 out of 29 patents)

5. Nicholas A Howgrave-Graham (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ntru Cryptosystems, Inc.. Retrieved from https://idiyas.com/company/ntru-cryptosystems

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]