H04L 9/0891
Revocation or update of secret information
Official title: {Revocation or update of secret information, e.g. encryption key update or rekeying}
H04L9/0891 (Revocation or update of secret information) appears on 4,482 US grants and 5,138 published applications in this corpus.
Search patents in H04L- Granted patents
- 4,482
- Published applications
- 5,138
- Assignees
- 1,487
- Inventors
- 9,070
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 14 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 14 | 0 |
| 1996 | 10 | 0 |
| 1997 | 10 | 0 |
| 1998 | 17 | 0 |
| 1999 | 19 | 0 |
| 2000 | 20 | 0 |
| 2001 | 16 | 10 |
| 2002 | 13 | 50 |
| 2003 | 16 | 69 |
| 2004 | 20 | 53 |
| 2005 | 25 | 92 |
| 2006 | 45 | 112 |
| 2007 | 50 | 138 |
| 2008 | 61 | 137 |
| 2009 | 65 | 168 |
| 2010 | 92 | 114 |
| 2011 | 111 | 118 |
| 2012 | 135 | 85 |
| 2013 | 136 | 85 |
| 2014 | 141 | 114 |
| 2015 | 155 | 106 |
| 2016 | 122 | 132 |
| 2017 | 141 | 268 |
| 2018 | 169 | 267 |
| 2019 | 266 | 415 |
| 2020 | 352 | 434 |
| 2021 | 366 | 427 |
| 2022 | 423 | 402 |
| 2023 | 418 | 422 |
| 2024 | 409 | 349 |
| 2025 | 394 | 262 |
| 2026 | 199 | 309 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Scalable cryptographic key regeneration and redistribution to secure publish-subscribe systems6 Oct 2026US 12,756,552 B2Real-Time Innovations, Inc.
- Dynamic key reassignment for memory encryption keys6 Oct 2026US 12,756,553 B2International Business Machines Corporation
- System and method for establishing a quantum resistant temporal encryption and data aging communications protocol6 Oct 2026US 12,756,554 B2Bank of America Corporation
- Computer-implemented systems and methods for linking a blockchain to a digital twin6 Oct 2026US 12,756,569 B2nChain Licensing AG
- System and method for cryptographic continuity assertions6 Oct 2026US 12,756,570 B1
- Automatically Updating Cryptographic Keys Using a Learning Model8 Oct 2026US 2026/0312801 A1eBay Inc.
- Providing Customers Visibility Into Security And Compliance Of Services In A Customer Cloud Infrastructure Environment1 Oct 2026US 2026/0303342 A1Oracle International Corporation
- Processing a contingent action token securely1 Oct 2026US 2026/0303347 A12BC Innovations, LLC
- Password reset using an asymmetric encryption key pair1 Oct 2026US 2026/0303591 A1Sap SE
- Ai-enhanced entropy measurement system for randomness evaluation24 Sep 2026US 2026/0289243 A1Entrokey Labs Inc.
Most cited
By later US patents
- System and method for secure and reliable multi-cloud data replication579US 8,762,642 B2Twinstrata, Inc · 2014
- Method and apparatus for privacy and authentication in wireless networks463US 5,371,794 ASun Microsystems, Inc. · 1994
- Electronic-monetary system451US 5,920,629 ACitibank, N. A. · 1999
- Systems, methods, and computer program products for accelerated dynamic protection of data438US 7,280,658 B2International Business Machines Corporation · 2007
- Secured data format for access control433US 7,380,120 B1Guardian Data Storage, LLC · 2008