Studio del protocollo Keeloq e implementazione di un attacco con analisi di potenza

Keeloq cryptographic algorithm is used in many commercial applications to achieve a good level of security in wireless transmissions. It is included in a lot of gate openers and anti-theft car systems. A lot of theoretical cryptanalysis literature is available on this algorithm, however pratical applications of the literature’s finding are very limited. In this study a different approach that employs a side-channel technique for analyzing Keeloq real systems is used. This technique, based on Differential Power Analysis, allows to discover secret information from the transmitter and consequently to duplicate the transmitter device, making Keeloq systems less secure. This work shows successful attacks on HCS30X commercial devices