H04L 9/0643
Hash functions
Official title: {Hash functions, e.g. MD5, SHA, HMAC or f9 MAC}
H04L9/0643 (Hash functions) appears on 5,535 US grants and 6,307 published applications in this corpus.
Search patents in H04L- Granted patents
- 5,535
- Published applications
- 6,307
- Assignees
- 1,811
- Inventors
- 9,360
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 10 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 10 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 19 |
| 2003 | 5 | 12 |
| 2004 | 5 | 20 |
| 2005 | 5 | 21 |
| 2006 | 10 | 20 |
| 2007 | 17 | 31 |
| 2008 | 15 | 28 |
| 2009 | 15 | 28 |
| 2010 | 29 | 51 |
| 2011 | 33 | 44 |
| 2012 | 47 | 34 |
| 2013 | 48 | 35 |
| 2014 | 55 | 64 |
| 2015 | 50 | 62 |
| 2016 | 82 | 106 |
| 2017 | 92 | 192 |
| 2018 | 158 | 394 |
| 2019 | 297 | 715 |
| 2020 | 580 | 1206 |
| 2021 | 851 | 1068 |
| 2022 | 889 | 717 |
| 2023 | 840 | 531 |
| 2024 | 671 | 387 |
| 2025 | 488 | 333 |
| 2026 | 213 | 188 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Memory systems and devices including examples of generating access codes for memory regions using authentication logic6 Oct 2026US 12,755,060 B2Micron Technology, Inc.
- Vehicle secure start method and apparatus, electronic control unit and storage medium6 Oct 2026US 12,756,576 B2Contemporary Amperex Technology (Hong Kong) Limited
- Systems and methods for tracking historic driver data on the edge29 Sep 2026US 12,746,933 B2Moter Technologies, Inc.
- Verifying machine learning model integrity by hashing29 Sep 2026US 12,748,894 B2Love DAO
- User interface log validation via blockchain system and methods29 Sep 2026US 12,749,126 B2Nanthealth, Inc.
- Systems and methods for multi-entity blockchain-based event break prevention8 Oct 2026US 2026/0311172 A1Citibank, N. A.
- System and method for randomness extraction and method of performing quantum cryptography8 Oct 2026US 2026/0312794 A1National University of Singapore
- Mobile device requiring identity-related informration to unlock a lock in one of two modes for unlocking the lock and related systems and methods1 Oct 2026US 2026/0301494 A1Dauntless Labs, LLC
- Secure network addresses1 Oct 2026US 2026/0303346 A1nChain Licensing AG
- System for recording verification keys on a blockchain1 Oct 2026US 2026/0303614 A1nChain Licensing AG
Most cited
By later US patents
- Steganographic method and device844US 5,613,004 ADice Corporation · 1997
- Electronic casino gaming apparatus with improved play capacity, authentication and security744US 5,643,086 ASilicon Gaming, Inc. · 1997
- Steganographic method and device605US 5,687,236 ADice Corporation · 1997
- Electronic casino gaming system with improved play capacity, authentication and security546US 6,106,396 ASilicon Gaming, Inc. · 2000
- Cryptographic co-processor323US 6,704,871 B1SafeNet, Inc. · 2004