Watermarking system that executes received watermarking instructions to embed a watermark
US8180708B2 · kind B2 · utility
71Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2005 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Sep 23, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/101
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of managing keys is provided. According to one exemplary method, digital content data encrypted with a first encrypting key is decrypted using a first decrypting key, and re-encrypted using a second encrypting key. A second decrypting key is encrypted using a third encrypting key to produce an encrypted second decrypting key. In some embodiments, an encrypted first decrypting key that was encrypted using a fourth encrypting key is received, and the encrypted first decrypting key is decrypted using a fourth decrypting key to reproduce the first decrypting key. An application for use on a computer system is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.