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Now, researchers from Finnish cyber-security firm F-Secure figured out a new way to disable this overwrite security measure by physically manipulating the computer's firmware, potentially allowing attackers to recover sensitive data stored on the computer after a cold reboot in a matter of few minutes.' Cold boot attacks are a known method of obtaining encryption keys from devices. But the reality is that attackers can get their hands on all kinds of information using these attacks.
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Passwords, credentials to corporate networks, and any data stored on the machine are at risk,' the security firm warns in a published today.Video Demonstration of the New Cold Boot AttackUsing a simple tool, researchers were able to rewrite the non-volatile memory chip that contains the memory overwrite settings, disable it, and enable booting from external devices. You can also watch the video demonstration performing the attack below. Like the traditional cold boot attack, the new attack also requires physical access to the target device as well as right tools to recover remaining data in the computer's memory.'
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It's not exactly easy to do, but it is not a hard enough issue to find and exploit for us to ignore the probability that some attackers have already figured this out,' says F-Secure principal security consultant Olle Segerdahl, one the two researchers.' It's not exactly the kind of thing that attackers looking for easy targets will use.
But it is the kind of thing that attackers looking for bigger phish, like a bank or large enterprise, will know how to use.' How Microsoft Windows and Apple Users Can Prevent Cold Boot Attacks.
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