Concealed, non-intrusive watermarks for configuration bitstreams
US7519823B1 · kind B1 · utility
9Cited by
21References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2004 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Dec 26, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/608
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Various approaches for embedding identifier information in a configuration bitstream for a programmable logic device (PLD) are disclosed. In various embodiments, the bits in the configuration bitstream that are unused in implementing a the design are identified. The identifier information is encrypted, and a subset of the unused bits are selected using a pseudo-random function. The encrypted identifier information is placed in the selected subset of unused bits. Decryption is accomplished by reversing the encryption approach.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.