H04L 9/3271
Using challenge-response
Official title: {using challenge-response}
H04L9/3271 (Using challenge-response) appears on 5,655 US grants and 6,849 published applications in this corpus.
Search patents in H04L- Granted patents
- 5,655
- Published applications
- 6,849
- Assignees
- 1,804
- Inventors
- 10,289
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 11 | 0 |
| 1993 | 11 | 0 |
| 1994 | 12 | 0 |
| 1995 | 8 | 0 |
| 1996 | 16 | 0 |
| 1997 | 18 | 0 |
| 1998 | 26 | 0 |
| 1999 | 16 | 0 |
| 2000 | 29 | 0 |
| 2001 | 22 | 13 |
| 2002 | 8 | 62 |
| 2003 | 23 | 69 |
| 2004 | 25 | 85 |
| 2005 | 29 | 134 |
| 2006 | 63 | 168 |
| 2007 | 72 | 223 |
| 2008 | 73 | 232 |
| 2009 | 81 | 215 |
| 2010 | 151 | 261 |
| 2011 | 141 | 223 |
| 2012 | 202 | 191 |
| 2013 | 246 | 179 |
| 2014 | 283 | 220 |
| 2015 | 249 | 233 |
| 2016 | 233 | 259 |
| 2017 | 243 | 293 |
| 2018 | 251 | 387 |
| 2019 | 326 | 491 |
| 2020 | 403 | 490 |
| 2021 | 442 | 546 |
| 2022 | 465 | 471 |
| 2023 | 440 | 381 |
| 2024 | 393 | 372 |
| 2025 | 390 | 304 |
| 2026 | 222 | 347 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Computer implemented method and system for the provision of access to a plurality of functions and applications associated with a blockchain6 Oct 2026US 12,756,582 B2nChain Licensing AG
- Encrypted handshake for trust validation between two applications29 Sep 2026US 12,750,233 B2Sap SE
- Physically unclonable function device29 Sep 2026US 12,750,246 B2TTP Plc
- Unified neuro-cognitive security system for human and synthetic entities22 Sep 2026US 12,743,498 B1
- Application integrity attestation22 Sep 2026US 12,743,555 B2Apple Inc.
- Physically unclonable function (puf) generation8 Oct 2026US 2026/0312831 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Obtaining a configurator public key for authentication1 Oct 2026US 2026/0303353 A1Hewlett Packard Enterprise Development LP
- Authenticated Message Delivery With Controlled Routing Gateway1 Oct 2026US 2026/0303364 A1
- Authentication apparatus, authentication target apparatus, image forming apparatus, replacement unit, and authentication method1 Oct 2026US 2026/0303376 A1Canon Kabushiki Kaisha
- Cross-node data transmission method and related apparatus1 Oct 2026US 2026/0303377 A1
Most cited
By later US patents
- Secure online music distribution system1,448US 6,385,596 B1Liquid Audio, Inc. · 2002
- Rechargeable battery pack and operating system1,445US 7,941,865 B2Black & Decker Inc. · 2011
- Methods and entities using IPSec ESP to support security functionality for UDP-based traffic1,019US 8,639,936 B2Alcatel Lucent · 2014
- RFID mutual authentication verification session977US 7,450,010 B1TC License Ltd. · 2008
- Physiological test credit method627US 9,787,568 B2Cercacor Laboratories, Inc. · 2017