Hardware security to countermeasure side-channel attacks

An apparatus for decrypting at least one cipher-text to at least one plaintext using at least one password key, the apparatus comprising:

• at least one memory;
• and
• at least one processor coupled to the at least one memory and configured to:
• perform at least one genuine computation that is dependent on the at least one cipher-text and the at least one password key;
• and
• perform at least one redundant computation that is independent of the at least cipher-text or the at least one password key;
• wherein the apparatus emits first analog electrical characteristics when the at least one genuine computation is performed and emits second analog electrical characteristics when the at least one redundant computation is performed, wherein a metric of similarity between the first analog electrical characteristics and the second analog electrical characteristics satisfies a threshold.

A method of encrypting at least one plaintext to at least one cipher-text using at least one password key, the method comprising:

• performing, by a computing device, at least one genuine computation that is dependent on the at least one plaintext and the at least one password key;
• emitting, by the computing device, first analog electrical characteristics in response to the performing of the at least one genuine computation;
• performing, by the computing device, at least one redundant computation that is independent of the at least one plaintext or the at least one password key;
• and
• emitting, by the computing device, second analog electrical characteristics in response to the performing of the at least one redundant computation,
• wherein a metric of similarity between the first analog electrical characteristics and the second analog electrical characteristics satisfies a threshold.

A method of decrypting at least one cipher-text to at least one plaintext using at least one password key, the method comprising:

• performing, by a computing device, at least one genuine computation that is dependent on the at least one cipher-text and the at least one password key;
• emitting, by the computing device, first analog electrical characteristics in response to the performing of the at least one genuine computation;
• performing, by the computing device, at least one redundant computation that is independent of the at least one cipher-text or the at least one password key;
• and
• emitting, by the computing device, second analog electrical characteristics in response to the performing of the at least one redundant computation,
• wherein a metric of similarity between the first analog electrical characteristics and the second analog electrical characteristics satisfies a threshold.