RTFA: http://citp.princeton.edu/memory/

Abstract Contrary to popular assumption, DRAMs used in most modern computers retain their contents for seconds to minutes after power is lost, even at operating temperatures and even if removed from a motherboard. Although DRAMs become less reliable when they are not refreshed, they are not immediately erased, and their contents persist sufficiently for malicious (or forensic) acquisition of usable full-system memory images. We show that this phenomenon limits the ability of an operating system to protect cryptographic key material from an attacker with physical access. We use cold reboots to mount attacks on popular disk encryption systems - BitLocker, FileVault, dm-crypt, and TrueCrypt - using no special devices or materials. We experimentally characterize the extent and predictability of memory remanence and report that remanence times can be increased dramatically with simple techniques. We offer new algorithms for finding cryptographic keys in memory images and for correcting errors caused by bit decay. Though we discuss several strategies for partially mitigating these risks, we know of no simple remedy that would eliminate them.

WOW!!! AMAZING work. I was absolutely floored by the decompressed air trick. Check out the video.

RTFA: http://www.eff.org/deeplinks/2008/02/adobe-pushes-…

The immense popularity of sites like YouTube has unexpectedly turned Flash Video (FLV) into one of the de facto standards for Internet video. The proliferation of sites using FLV has been a boon for remix culture, as creators made their own versions of posted videos. And thus far there has been no widespread DRM standard for Flash or Flash Video formats; indeed, most sites that use these formats simply serve standalone, unencrypted files via ordinary web servers.

I can’t say I’m surprised… but that’s just because I have no faith in the DRM world.