System and method for decryption of content including disconnected encryption chains
US8687809B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jan 24, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments may include receiving a protected version of content including different encryption chains including encrypted blocks of content. The protected version of content may include decryption information for decrypting the encrypted chains; the decryption information may include initialization vectors that are distinct from the content. Embodiments may also include performing chained decryption on a particular sequence of data blocks including multiple encryption chains from the protected version of the content and at least some of the initialization vectors. Some of the initialization vectors may be positioned between the encryption chains within the particular sequence such that during the chained decryption the initialization vectors are decrypted in sequence with the data blocks of the encryption chains. The chained decryption may result in a sequence of decrypted data blocks including decrypted initialization vectors. Embodiments may include generating a decrypted version of the content by excluding the decrypted initialization vectors from that sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.