G11B 20/0021
Involving encryption or decryption of contents recorded on or reproduced from a
Official title: {involving encryption or decryption of contents recorded on or reproduced from a record carrier}
G11B20/0021 (Involving encryption or decryption of contents recorded on or reproduced from a) appears on 2,093 US grants and 2,315 published applications in this corpus.
Search patents in G11B- Granted patents
- 2,093
- Published applications
- 2,315
- Assignees
- 453
- Inventors
- 2,778
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 12 | 0 |
| 1996 | 12 | 0 |
| 1997 | 17 | 0 |
| 1998 | 51 | 0 |
| 1999 | 39 | 0 |
| 2000 | 41 | 0 |
| 2001 | 54 | 45 |
| 2002 | 63 | 196 |
| 2003 | 94 | 186 |
| 2004 | 84 | 197 |
| 2005 | 68 | 234 |
| 2006 | 156 | 209 |
| 2007 | 147 | 259 |
| 2008 | 147 | 224 |
| 2009 | 163 | 201 |
| 2010 | 166 | 160 |
| 2011 | 171 | 88 |
| 2012 | 135 | 86 |
| 2013 | 112 | 55 |
| 2014 | 115 | 47 |
| 2015 | 76 | 29 |
| 2016 | 45 | 26 |
| 2017 | 24 | 14 |
| 2018 | 22 | 19 |
| 2019 | 15 | 10 |
| 2020 | 17 | 16 |
| 2021 | 9 | 6 |
| 2022 | 9 | 2 |
| 2023 | 8 | 3 |
| 2024 | 3 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 20/00217The cryptographic key used for encryption and/or decryption of contents recorded on1,132
- G11B 20/00485Characterised by a specific kind of data which is encrypted and recorded775
- G11B 20/0042The copy protection scheme being related to a specific access protection standard197
- G11B 20/00478Wherein contents are decrypted and re-encrypted with a different key when being66
Recent patents
- Internal storage in cloud disk to support encrypted hard drive and other stateful features14 Oct 2025US 12,443,543 B2Google Inc.
- Object identification and device communication through image and audio signals18 Jun 2024US 12,014,408 B2Digimarc Corporation
- Internal storage in cloud disk to support encrypted hard drive and other stateful features7 May 2024US 11,977,492 B2Google Inc.
- Systems and methods for authenticating and presenting video evidence6 Feb 2024US 11,895,439 B2Xirgo Technologies, LLC
- Apparatus and method for interfacing between A/V system and portable device26 Dec 2023US RE49,766 E1Samsung Electronics Co., Ltd.
- Transfer stations and methods for transferring autonomous vehicle sensor data to a remote data storage server22 Jan 2026US 2026/0024380 A1TORC Robotics, Inc.
- Object identification and device communication through image and audio signals22 May 2025US 2025/0166035 A1Digimarc Corporation
- Internal Storage In Cloud Disk To Support Encrypted Hard Drive And Other Stateful Features5 Dec 2024US 2024/0403229 A1Google Inc.
- Internal Storage In Cloud Disk To Support Encrypted Hard Drive And Other Stateful Features30 Nov 2023US 2023/0385205 A1Google Inc.
- Protection against executing injected malicious code27 Apr 2023US 2023/0126908 A1International Business Machines Corporation
Most cited
By later US patents
- Cryptographic communications system and method1,449US 4,405,829 AMassachusetts Institute of Technology · 1983
- Methods for surveying dissemination of proprietary empirical data1,132US 5,862,260 ADigimarc Corporation · 1999
- Computer system linked by using information in data objects1,131US 6,122,403 ADigimarc Corporation · 2000
- Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels1,021US 5,943,422 AIntertrust Technologies Corporation · 1999
- Trusted infrastructure support system, methods and techniques for secure electronic commerce transaction and rights management720US 6,658,568 B1Intertrust Technologies Corporation · 2003