H04L 9/0618
Block ciphers, i.e. encrypting groups of characters of a plain text message
Official title: {Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation}
H04L9/0618 (Block ciphers, i.e. encrypting groups of characters of a plain text message) appears on 7,291 US grants and 8,306 published applications in this corpus.
Search patents in H04L- Granted patents
- 7,291
- Published applications
- 8,306
- Assignees
- 2,207
- Inventors
- 11,203
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 5 | 0 |
| 1991 | 10 | 0 |
| 1992 | 3 | 0 |
| 1993 | 13 | 0 |
| 1994 | 14 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 17 | 0 |
| 1998 | 26 | 0 |
| 1999 | 7 | 0 |
| 2000 | 16 | 0 |
| 2001 | 32 | 17 |
| 2002 | 15 | 60 |
| 2003 | 18 | 59 |
| 2004 | 22 | 74 |
| 2005 | 30 | 76 |
| 2006 | 45 | 76 |
| 2007 | 42 | 75 |
| 2008 | 52 | 100 |
| 2009 | 58 | 87 |
| 2010 | 87 | 139 |
| 2011 | 78 | 91 |
| 2012 | 111 | 103 |
| 2013 | 123 | 91 |
| 2014 | 150 | 99 |
| 2015 | 130 | 173 |
| 2016 | 143 | 205 |
| 2017 | 202 | 334 |
| 2018 | 217 | 417 |
| 2019 | 408 | 1043 |
| 2020 | 716 | 1662 |
| 2021 | 1027 | 1080 |
| 2022 | 1084 | 627 |
| 2023 | 857 | 552 |
| 2024 | 672 | 464 |
| 2025 | 529 | 333 |
| 2026 | 274 | 269 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Obfuscating cryptographic material in memory6 Oct 2026US 12,754,854 B2Capital One Services, LLC
- Anonymous data retrieval method, client and server6 Oct 2026US 12,756,537 B2Lenovo (Beijing) Limited
- Ciphertext nullification operations6 Oct 2026US 12,756,538 B2International Business Machines Corporation
- Apparatus and method for generating quantum circuit for ARIA substitution layer6 Oct 2026US 12,756,539 B2Electronics and Telecommunications Research Institute
- Forward secrecy QSL6 Oct 2026US 12,756,544 B2QuSecure, Inc
- Systems and methods for multi-entity blockchain-based event break prevention8 Oct 2026US 2026/0311172 A1Citibank, N. A.
- Computer system for providing payments, incentives, and fraud protection within or across industries8 Oct 2026US 2026/0311209 A1Pay With Spire, Inc.
- Health data exchange platform8 Oct 2026US 2026/0311858 A1Youngblood IP Holdings, LLC
- Independent sequence processing to facilitate security between nodes in wireless networks8 Oct 2026US 2026/0312619 A1Texas Instruments Incorporated
- Ciphertext header-based data security8 Oct 2026US 2026/0312789 A1T-Mobile Innovations LLC
Most cited
By later US patents
- Method and system for multimedia access control enablement785US 5,319,705 AInternational Business Machines Corporation · 1994
- System and method for secure and reliable multi-cloud data replication579US 8,762,642 B2Twinstrata, Inc · 2014
- Secure communication architecture for medical devices493US 9,980,140 B1Bigfoot Biomedical, Inc. · 2018
- Data compression, encryption, and in-line transmission system339US 4,386,416 AMostek Corporation · 1983
- Secure cloud storage distribution and aggregation332US 9,280,678 B2Fortinet, Inc. · 2016