RSA 1024-bits Key Encryption Cracked!

By linathael. Original by Lionel - 08/03/2010 06:00:00 CET - Category: Software - Source: Techworld

Scientist from the University of Michigan reports to have found a weakness in the key encryption system used for almost all authentication process. They also describe the associated way to exploit it to crack the key in about 100 hours while it would have taken years by brute force attack. Most details are provided in this PDF file.

In summary, instead of using brute force, they stressed the processor containing the authentication key by submitting it to voltage stress. Subsequent errors allowed scientists to reconstitute the key. This information comes couple of weeks after some scientists successfully cracked by brute force attack in 2.5 years a 768-bits encryption key. The way to avoid such stress-based attack would be to modify CPU to make them insensitive to such voltage variation. Now, the next protection level would be 2048-bist encryption...

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