H04L 63/1475
Passive attacks
Official title: {Passive attacks, e.g. eavesdropping or listening without modification of the traffic monitored}
H04L63/1475 (Passive attacks) appears on 409 US grants and 420 published applications in this corpus.
Search patents in H04L- Granted patents
- 409
- Published applications
- 420
- Assignees
- 243
- Inventors
- 956
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 5 |
| 2006 | 2 | 1 |
| 2007 | 2 | 6 |
| 2008 | 2 | 6 |
| 2009 | 3 | 7 |
| 2010 | 7 | 7 |
| 2011 | 8 | 9 |
| 2012 | 6 | 12 |
| 2013 | 8 | 10 |
| 2014 | 18 | 21 |
| 2015 | 14 | 29 |
| 2016 | 30 | 20 |
| 2017 | 31 | 27 |
| 2018 | 24 | 33 |
| 2019 | 37 | 27 |
| 2020 | 25 | 50 |
| 2021 | 39 | 34 |
| 2022 | 43 | 36 |
| 2023 | 29 | 24 |
| 2024 | 28 | 24 |
| 2025 | 31 | 14 |
| 2026 | 15 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Enhancing security of quantum communication channels8 Sep 2026US 12,732,537 B2Bar-Ilan University
- System and method for decentralized internet traffic filtering policy reporting18 Aug 2026US 12,712,912 B2Uab 360 It
- Using non-routable addressing to reduce attack surface in secure access systems18 Aug 2026US 12,712,914 B2Cisco Technology, Inc.
- Determining sum length of host and path in encrypted HTTP request message18 Aug 2026US 12,712,924 B1Cujo LLC
- Methods and systems for attack generation on data lakes19 May 2026US 12,634,323 B2Theom, Inc.
- Covert transmission method against active and passive cooperative attacks in cognitive radio network20 Aug 2026US 2026/0246557 A1China Three Gorges University
- Threat detection platforms for detecting, characterizing, and remediating email-based threats in real time13 Aug 2026US 2026/0238659 A1Abnormal AI, Inc.
- Secure transmission13 Aug 2026US 2026/0238680 A1Oxford University Innovation Limited
- A method, server and computer software for provisioning an encrypted domain name system30 Jul 2026US 2026/0222410 A1Vodafone Group Services Limited
- Enhancing security of quantum communication channels9 Jul 2026US 2026/0197345 A1Bar-Ilan University
Most cited
By later US patents
- Systems and methods for correlating and distributing intrusion alert information among collaborating computer systems339US 7,779,463 B2The Trustees of Columbia University in the City of New York · 2010
- Preventing extraction of secret information over a compromised encrypted connection313US 9,386,104 B2Juniper Networks, Inc. · 2016
- System and method to detect premium attacks on electronic networks and electronic devices289US 10,121,000 B1FireEye, Inc. · 2018
- Method and apparatus for preventing network traffic analysis265US 6,917,974 B1The United States of America as represented by the Secretary of the Air Force · 2005
- Packet threshold-mix batching dispatcher to counter traffic analysis246US 8,180,917 B1Trend Micro Incorporated · 2012