Titulo no valido..  y tampoco lo es esto:
Descifrar no es lo mismo que captar. ***** periodistas ignorantes.

Saludos

Q18: How do you extract the secret key bits?

The key extraction attacks finds the secret key bits one by one, sequentially. For each bit, the attacker craft a ciphertext of a special form, that makes the acoustic leakage depend specifically on the value of that bit. The attacker then triggers decryption of that chosen ciphertext, records the resulting sound, and analyzes it. The following demonstrates a typical stage of this attack, focusing on a single secret key bit. If this bit is 0, then decryption of the chosen ciphertext will sound like the left-side spectrogram (with a strong component at 35.2 kHz). If the secret bit is 1, the decryption will sound like the right-side spectrogram (where the strong component is at 38.1 kHz).



Using automated signal classification, the attack tells apart these cases, and deduces the secret key bit.

Para eso instalo un keylogger y termino antes xD.. pero volvemos a lo mismo.. descifraron el audio que contenía la clave.. no el propio hash. Osea, si el ordenador no hubiese emitido esos sonidos.. no serian capaces de hacerlo...

Saludos