H04L 63/064
Hierarchical key distribution
Official title: {Hierarchical key distribution, e.g. by multi-tier trusted parties}
H04L63/064 (Hierarchical key distribution) appears on 141 US grants and 156 published applications in this corpus.
Search patents in H04L- Granted patents
- 141
- Published applications
- 156
- Assignees
- 95
- Inventors
- 390
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2001 | 2 | 0 |
| 2002 | 0 | 7 |
| 2003 | 1 | 3 |
| 2004 | 0 | 2 |
| 2005 | 0 | 7 |
| 2006 | 2 | 2 |
| 2007 | 2 | 4 |
| 2008 | 4 | 4 |
| 2009 | 6 | 6 |
| 2010 | 1 | 8 |
| 2011 | 6 | 1 |
| 2012 | 4 | 7 |
| 2013 | 4 | 8 |
| 2014 | 10 | 7 |
| 2015 | 9 | 9 |
| 2016 | 3 | 9 |
| 2017 | 6 | 7 |
| 2018 | 11 | 15 |
| 2019 | 17 | 9 |
| 2020 | 12 | 12 |
| 2021 | 10 | 3 |
| 2022 | 13 | 13 |
| 2023 | 5 | 5 |
| 2024 | 6 | 4 |
| 2025 | 1 | 3 |
| 2026 | 6 | 1 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Method and system for performance enhanced hierarchical key distribution system6 Oct 2026US 12,755,278 B2
- Method and terminal device for cryptographically secured transmission of data within a communication system25 Aug 2026US 12,719,702 B2Siemens Aktiengesellschaft
- Electricity meter and system hardened against attack vectors23 Jun 2026US 12,665,896 B2Itron, Inc.
- History access for end-to-end (E2E) secure content7 Apr 2026US 12,598,061 B2Cisco Technology, Inc.
- Message service with distributed key caching for server-side encryption31 Mar 2026US 12,592,817 B2Amazon Technologies, Inc.
- Method and Terminal Device for Cryptographically Secured Transmission of Data within a Communication System30 Apr 2026US 2026/0121868 A1Siemens Aktiengesellschaft
- Protection for restricted actions on critical resources10 Jul 2025US 2025/0225268 A1Microsoft Technology Licensing, LLC
- History access for end-to-end (e2e) secure content19 Jun 2025US 2025/0202691 A1Cisco Technology, Inc.
- Systems and methods for restricting fido key derivation identity binding24 Apr 2025US 2025/0132905 A1Capital One Services, LLC
- Electricity meter and system hardened against attack vectors8 Aug 2024US 2024/0267368 A1Itron, Inc.
Most cited
By later US patents
- Distributed group key management scheme for secure many-to-many communication204US 6,240,188 B1Matsushita Electric Industrial Co., Ltd. · 2001
- Dual encryption protocol for scalable secure group communication145US 6,263,435 B1Matsushita Electric Industrial Co., Ltd. · 2001
- Multiple authority key derivation83US 8,892,865 B1Amazon Technologies, Inc. · 2014
- Streaming system for distributing encrypted data, and streaming method therefor59US 7,337,320 B2Sony Corporation · 2008
- Security authentication and key management within an infrastructure-based wireless multi-hop network51US 7,793,104 B2Motorola, Inc. · 2010