Israeli cryptanalyst Adi Shamir (Adi Shamir), concerning the development of encryption keys with RSA, proved the possibility of keys decryption without any direct contact with the computer. Keys were obtained after studying sound picture that accompanied the computer working. Remarkably, this method can be used without the use of special equipment. During the experiment, were used as directional microphones highly sensitive and normal smartphone, recording sound on the built-in microphone . In other words, cracks can be made by relatively simple means.
Information carries high-frequency noise conversion elements CPU power or other active elements in the range of 10-150 kHz. Knowing the key parameters, the researchers recorded snapshots of high frequency noise corresponding to certain data, and then, in the course of time listening to some of the PC in the process of decryption, extracted from the acoustic pattern of 4096-bit RSA-key. A similar method can be applied to certain other methods of encryption. Note the acoustic method can be considered in some way private decryption process by analyzing the electromagnetic radiation PC. There are also methods that monitor the data signal from the video card to the monitor. The new version of GnuPG 1.4.16, working with RSA-key, and it is already involved algorithms difficult to obtain acoustic impressions. So the revelation of specialists should be regarded as advertising they develop the program, no more. Related Products :
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