Protection of digital content using block cipher crytography
US7055039B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 29, 2003 |
| Grant date | May 30, 2006 |
| Priority date | — |
| Expiry date | Nov 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Protection of digital content using a specific application of block cipher cryptography is described. The digital content is encrypted using an encryption key and a calculated initialization vector. The digital content includes a plurality of strides of data and each stride includes a string of data to be encrypted and a block of data to be encrypted. The calculated initialization vector to be used to encrypt the block of data is derived from the string of data in the stride to be encrypted. Furthermore, the initialization vector is calculated by performing an exclusive disjunction function on a seed value and the string of data for each stride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.