Voltage Fluctuations, Heat, and Other Side-Channel Attacks

A presentation at the recent Black Hat meeting discussed a side-channel attack on web servers. Variations in supply voltage and CPU temperature can cause errors which leak information about the server’s RSA secret key. Full details are in their paper “Fault-Based Attack of RSA Authentication.” This is another case where cloud provider infrastructure could provide […]
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This Hash Result Startled Me!

Even when you work with this technology, sometimes you are really surprised to find that things don’t work at all as you might expect. Hash functions are one-way operations. It is easy to calculate the hash of even a large piece of data. But it should be impractically difficult to find an input that generates […]
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Certification and Compliance Don’t Make You Secure

Security > Certification + Compliance Certification and compliance can play a role in security.  They might be part of security, but there is no guarantee that they can provide it. Put another way, they might be necessary, at least for regulatory reasons, but they are not adequate on their own. Passing a certification exam proves […]
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The Scariest Thing About Cloud Computing…

If you ask several people what scares them about cloud computing, you will get several answers. Here’s one I hadn’t thought of in exactly these terms. Someone told me that the thing that just terrified them about cloud computing was how easy it was. That might sound a little strange, but he had an excellent […]
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The Patriot Act and the Cloud

A year ago, Microsoft’s U.K. managing director surprised many people by publicly admitting that Microsoft will hand over data stored in any of its worldwide facilities when asked to do so by the U.S. government. In fact, the cloud customers and their data subjects would not even be informed if there was a gag order […]
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