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Mgr. Michal Sládeček

Master's thesis

Analysis of attacks on variations of the Extended Hidden Number Problem

Analysis of attacks on variations of the Extended Hidden Number Problem
Abstract:
V práci analyzujeme problém únikov informácii z ECDSA noncov, so zameraním na veľmi malé úniky v strede noncu. Prinášame nové metódy, ktoré umožňujú pre tieto úniky použiť Bleichenbacherov útok. V práci skúmame tri rôzne typy únikov. Pre každý z nich prinášame metódy na presný odhad biasu. V práci ukazujeme, že úniky v strede noncov je možné využiť v niektorých konkrétnych prípadoch. Ukazujeme, že …more
Abstract:
This thesis explores the challenge of attacking information leaks from ECDSA nonces, focusing specifically on very small leaks located in the middle of nonces. The researchers introduce new methods that enable the implementation of Bleichenbacher’s attack for these specific leaks. The work investigates three different types of leaks, providing precise bias estimations for each. The study reveals that …more
 

Keywords

Hidden Number Problem Bleichenbacher’s attack Leak in middle of a nonce Bias Bleichenbacherov útok Úniky zo stredu noncov
 
Language used: English
Date on which the thesis was submitted / produced: 16. 5. 2023
Identifier: https://is.muni.cz/th/nemr5/

Thesis defence

  • Date of defence: 20. 6. 2023
  • Supervisor: Mgr. Marek Sýs, Ph.D.
  • Reader: Mgr. Ján Jančár

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Institution archiving the thesis and making it accessible: Masarykova univerzita, Fakulta informatiky
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Masaryk University

Faculty of Informatics

Master programme / field:
Computer systems, communication and security / Information security

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