Sunday, January 18, 2009

Vanity

I was doing a vanity search today on this page and found that my post "Defeating" whole disk encryption was cited in:

Christopher Hargreaves, Howard Chivers, "Recovery of Encryption Keys from Memory Using a Linear Scan," ares,pp.1369-1376, 2008 Third International Conference on Availability, Reliability and Security, 2008

I haven't read the article, but the abstract sounds enticing:

As encrypted containers are encountered more frequently the need for live imaging is likely to increase. However, an acquired live image of an open encrypted file system cannot later be verified against any original evidence, since when the power is removed the decrypted contents are no longer accessible. This paper shows that if a memory image is also obtained at the same time as the live container image, by the design of on-the-fly encryption, decryption keys can be recovered from the memory dump. These keys can then be used offline to gain access to the encrypted container file, facilitating standard, repeatable, forensic file system analysis. The recovery method uses a linear scan of memory to generate trial keys from all possible memory positions to decrypt the container. The effectiveness of this approach is demonstrated by recovering TrueCrypt decryption keys from a memory dump of a Windows XP system.

Academic respectability. Woot!