H04L 9/30
Public key, i.e. encryption algorithm being computationally infeasible to invert or user's
Official title: Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
H04L9/30 (Public key, i.e. encryption algorithm being computationally infeasible to invert or user's) appears on 7,243 US grants and 8,370 published applications in this corpus.
Search patents in H04L- Granted patents
- 7,243
- Published applications
- 8,370
- Assignees
- 2,109
- Inventors
- 11,114
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 10 | 0 |
| 1991 | 9 | 0 |
| 1992 | 8 | 0 |
| 1993 | 9 | 0 |
| 1994 | 10 | 0 |
| 1995 | 5 | 0 |
| 1996 | 16 | 0 |
| 1997 | 7 | 0 |
| 1998 | 23 | 0 |
| 1999 | 14 | 0 |
| 2000 | 26 | 0 |
| 2001 | 31 | 14 |
| 2002 | 34 | 73 |
| 2003 | 17 | 53 |
| 2004 | 31 | 96 |
| 2005 | 38 | 118 |
| 2006 | 64 | 114 |
| 2007 | 69 | 116 |
| 2008 | 67 | 119 |
| 2009 | 71 | 148 |
| 2010 | 126 | 152 |
| 2011 | 122 | 144 |
| 2012 | 138 | 155 |
| 2013 | 194 | 192 |
| 2014 | 210 | 196 |
| 2015 | 201 | 267 |
| 2016 | 271 | 321 |
| 2017 | 317 | 509 |
| 2018 | 356 | 529 |
| 2019 | 445 | 668 |
| 2020 | 582 | 814 |
| 2021 | 663 | 789 |
| 2022 | 759 | 678 |
| 2023 | 662 | 656 |
| 2024 | 635 | 652 |
| 2025 | 607 | 451 |
| 2026 | 374 | 346 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Validated access of an electronic module6 Oct 2026US 12,754,992 B2Hewlett Packard Enterprise Development LP
- Data encryption at a personal data sharing platform6 Oct 2026US 12,755,050 B2Tartle PBC
- Reversible secret key encryption of node parameters in neural networks6 Oct 2026US 12,755,052 B2Capital One Services, LLC
- Forward secrecy QSL6 Oct 2026US 12,756,544 B2QuSecure, Inc
- Timestamp generation method and apparatus, and electronic device and storage medium6 Oct 2026US 12,756,550 B2Electric Power Research Institute, China Southern Powerr Grid
- Health data exchange platform8 Oct 2026US 2026/0311858 A1Youngblood IP Holdings, LLC
- Centralized authorization for secure shell access8 Oct 2026US 2026/0312792 A1CyberArk Software Ltd.
- Communication method, communication system, server, and connected device8 Oct 2026US 2026/0312793 A1Panasonic Intellectual Property Management Co., Ltd.
- Quandle-based cryptography8 Oct 2026US 2026/0312805 A1Bar-Ilan University
- Efficient and secure access authentication system for user equipment and massive machine-type communication device8 Oct 2026US 2026/0312806 A1Kwangwoon University Industry-Academic Collaboration Foundation
Most cited
By later US patents
- Method and apparatus for the secure distributed storage and retrieval of information1,561US 5,991,414 AInternational Business Machines Corporation · 1999
- Method and apparatus for the secure distributed storage and retrieval of information1,551US 6,192,472 B1International Business Machines Corporation · 2001
- Scheme for information dispersal and reconstruction1,530US 5,485,474 APresident and Fellows of Harvard College · 1996
- Cryptographic communications system and method1,449US 4,405,829 AMassachusetts Institute of Technology · 1983
- System and method for secure three-party communications1,364US 8,316,237 B12012