Laptops in "Sleep" or "Hibernation" Mode Most Vulnerable to Attack
San Francisco - A team including the Electronic Frontier Foundation (EFF), Princeton University, and other researchers have found a major security flaw in several popular disk encryption technologies that leaves encrypted data vulnerable to attack and exposure.
"People trust encryption to protect sensitive data when their computer is out of their immediate control," said EFF Staff Technologist Seth Schoen, a member of the research team. "But this new class of vulnerabilities shows it is not a sure thing. Whether your laptop is stolen, or you simply lose track of it for a few minutes at airport security, the information inside can still be read by a clever attacker."
The researchers cracked several widely used disk encryption technologies, including Microsoft's BitLocker, Apple's FileVault, TrueCrypt, and dm-crypt. These "secure" disk encryption systems are supposed to protect sensitive information if a computer is stolen or otherwise accessed. However, in a paper and video published on the Internet today, the researchers show that data is vulnerable because encryption keys and passwords stored in a computer's temporary memory -- or RAM -- do not disappear immediately after losing power.
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