H04L 9/00
Cryptographic mechanisms or cryptographic arrangements for secret or secure communications
Official title: {Cryptographic mechanisms or cryptographic} arrangements for secret or secure communications; Network security protocols
H04L9/00 (Cryptographic mechanisms or cryptographic arrangements for secret or secure communications) appears on 68,040 US grants and 80,205 published applications in this corpus.
Search patents in H04L- Granted patents
- 68,040
- Published applications
- 80,205
- Assignees
- 13,229
- Inventors
- 95,631
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 4 | 0 |
| 1978 | 10 | 0 |
| 1979 | 23 | 0 |
| 1980 | 27 | 0 |
| 1981 | 18 | 0 |
| 1982 | 20 | 0 |
| 1983 | 18 | 0 |
| 1984 | 15 | 0 |
| 1985 | 25 | 0 |
| 1986 | 20 | 0 |
| 1987 | 36 | 0 |
| 1988 | 42 | 0 |
| 1989 | 68 | 0 |
| 1990 | 86 | 0 |
| 1991 | 102 | 0 |
| 1992 | 100 | 0 |
| 1993 | 175 | 0 |
| 1994 | 172 | 0 |
| 1995 | 204 | 0 |
| 1996 | 293 | 0 |
| 1997 | 315 | 0 |
| 1998 | 471 | 0 |
| 1999 | 436 | 0 |
| 2000 | 463 | 0 |
| 2001 | 445 | 212 |
| 2002 | 404 | 1010 |
| 2003 | 338 | 1028 |
| 2004 | 420 | 1026 |
| 2005 | 522 | 1418 |
| 2006 | 766 | 1464 |
| 2007 | 800 | 1662 |
| 2008 | 821 | 1834 |
| 2009 | 940 | 1847 |
| 2010 | 1307 | 1891 |
| 2011 | 1335 | 1729 |
| 2012 | 1725 | 1883 |
| 2013 | 2159 | 2108 |
| 2014 | 2654 | 2312 |
| 2015 | 2483 | 2662 |
| 2016 | 2531 | 2982 |
| 2017 | 2736 | 3562 |
| 2018 | 2775 | 4133 |
| 2019 | 3686 | 5437 |
| 2020 | 4688 | 7018 |
| 2021 | 5378 | 6617 |
| 2022 | 5984 | 5912 |
| 2023 | 5478 | 5726 |
| 2024 | 5544 | 5757 |
| 2025 | 5400 | 5026 |
| 2026 | 3569 | 3949 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04L 9/32Including means for verifying the identity or authority of a user of42,044
- H04L 9/08Key distribution or management30,580
- H04L 9/06The encryption apparatus using shift registers or memories for block-wise or stream13,663
- H04L 9/50Cryptographic mechanisms or cryptographic arrangements for secret or secure communications: using hash12,483
- H04L 9/30Public key, i.e. encryption algorithm being computationally infeasible to invert or user's7,243
- H04L 9/14Cryptographic mechanisms or cryptographic arrangements for secret or secure communications: using a6,254
- H04L 9/40Network security protocols4,249
- H04L 9/002Countermeasures against attacks on cryptographic mechanisms1,953
All 16 subgroupsShow fewer
- H04L 9/008Involving homomorphic encryption1,603
- H04L 9/12Transmitting and receiving encryption devices synchronised or initially set up in a1,361
- H04L 9/006Involving public key infrastructure [pki] trust models1,296
- H04L 9/001Cryptographic mechanisms or cryptographic arrangements for secret or secure communications: using chaotic214
- H04L 9/34Bits, or blocks of bits, of the telegraphic message being interchanged in87
- H04L 9/10Cryptographic mechanisms or cryptographic arrangements for secret or secure communications: with particular54
- H04L 9/36Cryptographic mechanisms or cryptographic arrangements for secret or secure communications: with means54
- H04L 9/38Encryption being effected by mechanical apparatus44
Recent patents
- Cloud-based keyless entry system6 Oct 2026US 12,752,736 B2Red Hat, Inc.
- Systems and methods for region-specific sub-tokenization in cryptographic transaction processing6 Oct 2026US 12,754,690 B2Vannadium, Inc.
- Secure virtualized cryptographic subsystems for autonomous systems and applications6 Oct 2026US 12,754,756 B2NVIDIA Corporation
- Key server and storage deadlock control6 Oct 2026US 12,754,780 B2International Business Machines Corporation
- Obfuscating cryptographic material in memory6 Oct 2026US 12,754,854 B2Capital One Services, LLC
- System and Method for Generative Artificial Intelligence Merging, Construction, and Optimization of Application Program Interfaces8 Oct 2026US 2026/0310528 A1Bank of America Corporation
- Data transfer between two data processing units8 Oct 2026US 2026/0310804 A1Siemens Aktiengesellschaft
- Systems and methods for authenticating users to access data8 Oct 2026US 2026/0310814 A1Stripe, Inc.
- Computing technologies for privacy-preserving service of data based on zero-knowledge proofs8 Oct 2026US 2026/0310822 A1Datasent, Inc.
- Asset-backed digital tokens8 Oct 2026US 2026/0311150 A1Precidian Investments, LLC
Most cited
By later US patents
- System for allowing all remote computers to perform annotation on an image and replicating the annotated image on the respective displays of other comuters2,385US 5,608,872 ANCR Corporation · 1997
- System for generation of user profiles for a system for customized electronic identification of desirable objects2,365US 5,754,939 A1998
- Internet service of differently formatted viewable data signals including commands for browser execution2,255US 6,295,530 B12001
- Remote collaboration system including first program means translating user inputs into annotations and running on all computers while second program means runs on one computer2,250US 5,761,419 ANCR Corporation · 1998
- Method and apparatus for serving files to browsing clients2,153US 6,826,565 B2Ablaise Limited · 2004