Introduction: Privacy-preserving computation is a crucial discipline that protects the privacy of confidential data while facilitating secure analysis. In graph problems, secure multiparty computation (SMC) presents a promising approach to performing these functionalities. This article delves into the notable advancements in privacy-preserving parallel algorithms recently introduced in a Ph.D. thesis. By integrating graph algorithms with […]

The cornerstone of democracy is the right for voters to participate in free and fair elections. However, securing elections is a non-trivial task due to the conflicting security requirements.  On the one hand, to provide the freedom to vote, it should not be possible to coerce voters into voting for a specific candidate. Therefore, the […]

Intervjueeris Raimond-Hendrik Tunnel Meie eelmine mängujämmide lugu andis ülevaate Tartu Ülikooli mängujämmidest ning kirjeldas nende käigus loodud märkimisväärseid mänge. Seekord kõneleme samal teemal arvutiteaduse instituudi hajussüsteemide nooremlektori Jürmo Mehisega. Jürmo on osalenud mitmetel jämmidel ning olnud paljude mängujämmide õhtujuht. Vestlesime tema huvidest, teest mängundusse ning mängujämmide ja Eesti mänguarenduse tulevikust. Tean, et sa tegeled päris […]

The original article (in Estonian) by Airika Harrik was published in Novaator. Estonia has used the ID card system as a means to identify its citizens for almost 20 years. During those years, several security issues have emerged. A new PhD dissertation from the University of Tartu has shed light on those issues and pointed […]

On Friday, August 28 Janno Siim defended his PhD thesis „Non-Interactive Shuffle Arguments„ A fundamental requirement for all democratic governments is a secure voting system. In recent years some countries, like Estonia and Switzerland, have adopted internet voting (i-voting), and many more have experimented (e.g., Norway and Australia) or have plans to adopt it in […]

On the 13th of August Karim Baghery defended his PhD thesis „Reducing trust and improving security in zk-SNARKs and commitments„ in which he studied the zk-SNARKs from two different perspectives, namely reducing trust in their setup phase and improving their security in different applications. On the need for proof systems People frequently are asked to […]

From 1st to 5th July 2019 the annual Cyber Security Summer School (C3S), which was organized by the Institute of Computer Science, took place in Voore, Estonia. The topic of the C3S was “Blockchain: Applications and Security”. The main objective included an introduction of the key concepts, principles and techniques on the blockchain technology, their […]

On the 12th of June, Toomas Krips defended his PhD on „Improving performance of secure real-number operations“ in which he describes methods on how to improve real-number computations on secure computations. In the following blog post, Toomas tells a story on secure computations, real numbers and his doctoral thesis. There are two main components of […]

Ehsan Ebrahimi is a doctoral student at the Chair of Security and Theoretical Computer Science. He defended his doctoral thesis thesis “Post-Quantum Security in the Present of Superposition Queries” on January 21, supervised by Professor Dominique Unruh. Here is an overview of his work. Quantum Computing. Have you heard of Quantum Computers? Scientists and engineers are […]