Protecting against chosen plaintext attacks in untrusted storage environments that support data deduplication
US8281143B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2008 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Jul 26, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Various methods and systems for protecting against chosen plaintext attacks when encrypting data for storage on an untrusted storage system are disclosed. One method involves generating an encryption key for use in encrypting data and generating an identifier for the data. Generation of the encryption key is based upon a hash of the data to be encrypted. The method also involves detecting whether an encrypted copy of the data is already stored by a storage system, based upon the identifier. The method also modifies the data to be encrypted or the encryption key, based upon a client-specific value, prior to generating the identifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.