H04L 9/3242
Involving keyed hash functions
Official title: {involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC}
H04L9/3242 (Involving keyed hash functions) appears on 3,657 US grants and 4,198 published applications in this corpus.
Search patents in H04L- Granted patents
- 3,657
- Published applications
- 4,198
- Assignees
- 1,213
- Inventors
- 6,550
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 3 |
| 2002 | 3 | 16 |
| 2003 | 1 | 15 |
| 2004 | 10 | 23 |
| 2005 | 15 | 28 |
| 2006 | 14 | 30 |
| 2007 | 23 | 52 |
| 2008 | 23 | 48 |
| 2009 | 14 | 64 |
| 2010 | 41 | 69 |
| 2011 | 49 | 63 |
| 2012 | 53 | 67 |
| 2013 | 69 | 48 |
| 2014 | 99 | 80 |
| 2015 | 96 | 130 |
| 2016 | 124 | 229 |
| 2017 | 156 | 263 |
| 2018 | 182 | 259 |
| 2019 | 260 | 351 |
| 2020 | 309 | 484 |
| 2021 | 385 | 443 |
| 2022 | 447 | 407 |
| 2023 | 377 | 306 |
| 2024 | 386 | 296 |
| 2025 | 319 | 245 |
| 2026 | 172 | 179 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Derived unique key per hash encapsulated encrypted transaction (dukpheet)1 Oct 2026US 2026/0303355 A1Wells Fargo Bank, N. A.
Most cited
By later US patents
- Providing authorization and authentication in a cloud for a user of a storage array524US 9,300,660 B1Pure Storage, Inc. · 2016
- Protected resource access control utilizing credentials based on message authentication codes and hash chain values517US 8,984,602 B1EMC Corporation · 2015
- Storage array access control from cloud-based user authorization and authentication514US 9,444,822 B1Pure Storage, Inc. · 2016
- Event auditing system381US 5,978,475 ACounterpane Internet Security, Inc. · 1999
- Secure authentication of a user of a device during a session with a connected server372US 10,075,437 B1Behaviosec Inc · 2018