Ing. Petr Socha, Ph.D.

Theses

Bachelor theses

Effect of signal-to-noise ratio on the success of a side channel attack

Author
Adam Rektořík
Year
2022
Type
Bachelor thesis
Supervisor
Ing. Petr Socha, Ph.D.
Reviewers
Ing. Vojtěch Miškovský, Ph.D.
Summary
PRESENT cipher encrypts and decrypts a text block. Correlation power analysis introduces power consumption model to correlate against real consumption during encryption. During encryption can be introduces undesired phenomenons, that could decrease the correlation. Signal- to-noise ratio is a ratio of a signal against and undesired events. In the event of increase of undesired phenomenons, signal-to-noise ratio will decrease. This work deliberately changes the power of noise and encloses the relationship between signal-to-noise ratio and correlation power attack success rate.

Master theses

Side-channel analysis of Rainbow post-quantum signature

Author
David Pokorný
Year
2021
Type
Master thesis
Supervisor
Ing. Petr Socha
Reviewers
Dr.-Ing. Martin Novotný
Summary
Rainbow, a layered multivariate quadratic digital signature, is a candidate for~standardization by National institute of standards and technology (NIST). In~this paper, we present a CPA side-channel attack on the submitted 32-bit reference implementation. We evaluate the attack on an STM32F3 ARM microcontroller. After a successful attack, we propose countermeasures against side-channel attacks. Countermeasures are implemented and evaluated using leakage assessment.