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4096 Bit RSA Keys Cracked with Sound


Injun

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A trio of scientists have verified that results they first presented nearly 10 years ago are in fact valid, proving that they can extract a 4096-bit RSA key from a laptop using an acoustic side-channel attack that enables them to record the noise coming from the laptop during decryption, using a smartphone placed nearby. The attack, laid out in a new paper, can be used to reveal a large RSA key in less than an hour.

 

“In this paper we describe a new acoustic cryptanalysis key extraction attack, applicable to GnuPG’s current implementation of RSA. The attack can extract full 4096-bit RSA decryption keys from laptop computers (of various models), within an hour, using the sound generated by the computer during the decryption of some chosen ciphertexts. We experimentally demonstrate that such attacks can be carried out, using either a plain mobile phone placed next to the computer, or a more sensitive microphone placed 4 meters away,” 

http://threatpost.com/researchers-find-way-to-extract-4096-bit-rsa-key-via-sound/103234'>http://threatpost.com/researchers-find-way-to-extract-4096-bit-rsa-key-via-sound/103234

 

Time to make sure CarrerIQ (or other likeness) is not installed on my phone. :o

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