Tag Archives: Sven Laur

Cybersecurity related bachelor’s and master’s theses in University of Tartu 2015/2016

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Defense committee: Dominique Unruh (chairman), Siim Karus, Vitaly Skachek, Dirk Oliver Theis, Raimundas Matulevicius.

A Cost-Effective Approach to Key Management in Online Voting Scenarios
Abstract: Since smart cards both offer reasonable prices and expose an API for development, this document evaluates different approaches to implement threshold encryption over smart cards to support an electoral process.
Student: Sergio Andrés Figueroa Santos
Curriculum: NordSecMob (MSc)
Supervisor: Sven Heiberg, Helger Lipmaa, Tuomas Aura
Reviewer: Ivo Kubjas
Defense: 02.06.2016, 09:00, Liivi 2-405

Revision of Security Risk-oriented Patterns for Distributed Systems
Abstract: In this thesis, we target the secure system development problem by suggesting application of security risk-oriented patterns. The applicability of these security risk-oriented patterns is validated on business processes from aviation turnaround system.
Student: Silver Samarütel
Curriculum: Software Engineering (MSc)
Supervisor: Raimundas Matulevicius
Reviewer: Alexander Horst Norta
Defense: 02.06.2016, 09:00, Liivi 2-405

Role Based Access Control as SecureUML Model in Web Applications Development with Spring Security
Abstract: In order to support and simplify the model-driven approach for a web application development with Spring platform, realization of a concept plugin for Eclipse IDE is proposed. This plugin supports the recognition of Spring Security notations with capability to visualize the RBAC model on top of them.
Student: Andrey Sergeev
Curriculum: Cyber Security (MSc)
Supervisor: Raimundas Matulevicius
Reviewer: Henri Lakk
Defense: 02.06.2016, 09:00, Liivi 2-405

Secure and Efficient Mix-Nets
Abstract: This thesis studies a zero-knowledge shuffle argument proposed by J. Furukawa in 2005. Firstly, we provide a more detailed and easily readable description of the shuffle and shuffle-decryption zero-knowledge protocols than in the original paper. Secondly, we provide two new characterizations of a permutation matrix and two simple modifications of the shuffle protocol that reduce the computational complexity.
Student: Janno Siim
Curriculum: Computer Science (MSc)
Supervisor: Helger Lipmaa
Reviewer: Sven Laur
Defense: 02.06.2016, 09:00, Liivi 2-405

A Comprehensive Protocol Suite for Secure Two-Party Computation
Abstract: In some scenarios, a two-party model is a better fit when no natural third party is involved in the application. In this work, we design and implement a full protocol suite for two-party computations on Sharemind, providing an alternative and viable solution in such cases.
Student: Sander Siim
Curriculum: Computer Science (MSc)
Supervisor: Dan Bogdanov, Pille Pullonen
Reviewer: Dominique Unruh
Defense: 06.06.2016, 09:00, Liivi 2-405

An improved type system for a privacy-aware programming language and its practical applications
Abstract: he goal of this thesis is to make it easier to add protection domain kinds to the SecreC language by allowing the programmer to define the protection domain kind data types, arithmetic operations and type conversions in the SecreC language without changing the compiler.
Student: Ville Sokk
Curriculum: Computer Science (MSc)
Supervisor: Dan Bogdanov, Jaak Randmets
Reviewer: Vesal Vojdani
Defense: 06.06.2016, 09:00, Liivi 2-405

Energy Harvesting in Cooperative Communications
Abstract: Energy harvesting (EH) is a crucial technology for a variety of wireless systems that have limited access to a reliable electricity supply or recharging sources. In this thesis, the design of a multiple access relay system (MARS) using EH is considered.
Student: Akashkumar Rajaram
Curriculum: Cyber Security (MSc)
Supervisor: Nalin Jayakody, Vitaly Skachek
Reviewer: Bin Chen
Defense: 06.06.2016, 09:00, Liivi 2-405

Security of Eduroam Passwords
Abstract: The University of Tartu has decided that the university’s eduroam accounts will share the same user credentials as the rest of the university’s services. This could potentially be abused by exploiting weaknesses in wireless security in order to gain access to a user’s university account. The aim of this research was to uncover any such weaknesses.
Student: Raul-Martin Rebane
Curriculum: Computer Science (BSc)
Supervisor: Dominique Unruh
Reviewer: Meelis Roos
Defense: 06.06.2016, 09:00, Liivi 2-405

Applying a Security Testing Methodology: a Case Study
Abstract: This thesis aims to describe and apply a process necessary to verify the security of a web application. A checklist of security requirements was gathered combining OWASP ASVS web application security standard and OWASP Top Ten project.
Student: Karin Klooster
Curriculum: Computer Science (BSc)
Supervisor: Meelis Roos, Margus Freudenthal
Reviewer: Kritjan Krips
Defense: 08.06.2016

Word frequency based log analysis
Abstract: The purpose of this bachelor thesis is to explore if you can use word frequency based analysis for log files and find interesting events without knowing the log structure.
Student: Karl Lääts
Curriculum: Computer Science (BSc)
Supervisor: Meelis Roos
Reviewer: Artjom Lind
Defense: 08.06.2016

Randomly Distributed PIN Code Input Layout
Abstract: This thesis examines the possibility of reducing the visual security breach of PIN code input by randomising the input field.
Student: Rain Tõugjas
Curriculum: Computer Science (BSc)
Supervisor: Tauno Palts, Kristjan Krips
Reviewer:
Defense: 08.2016

Smart Home Hacking
Abstract: This work investigates the security and privacy issues found at an emerging smart home technology such as the CoSSMic platform.
Student: Suela Kodra
Curriculum: NordSecMob (MSc)
Supervisor: Danilo Gligoroski, Marie Moe, Dominique Unruh
Reviewer: Raimundas Matulevičius
Defense: 18.08.2016, 09:30, Liivi 2-403

Cache-Timing Techniques: Exploiting the DSA Algorithm
Abstract: This work explains some of the cache-timing techniques commonly used to exploit vulnerable software. Using a particular combination of techniques and exploiting a vulnerability found in the implementation of the DSA signature scheme in the OpenSSL shared library, a cache-timing attack is performed against the DSA’s sliding window exponentiation algorithm.
Student: Cesar Pereida Garcia
Curriculum: NordSecMob (MSc)
Supervisor: Billy Bob Brumley, Dominique Unruh, N. Asokan
Reviewer: Arnis Paršovs
Defense: 26.08.2016, 11:00, Liivi 2-403

Links:
https://comserv.cs.ut.ee/ati_thesis/index.php?year=2016
http://www.cs.ut.ee/sites/default/files/2016/loput88d/Kaitsmiste%20ajakava.pdf

PhD thesis: “Applying Secure Multi-party Computation in Practice”

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Riivo Talviste PhD thesis: “Applying Secure Multi-party Computation in Practice”
Defense date: 14.03.2016 – 16:15 (J. Liivi 2-405, Tartu, Estonia)

Thesis supervisor: Senior Research Fellow Sven Laur, Project manager Dan Bogdanov

Opponents:
Professor Stefan Katzenbeisser, Technische Universität Darmstadt (Germany)
Associate Professor Kurt Rohloff, New Jersey Institute of Technology (Newark, USA)

Summary:
In this work, we present solutions for technical difficulties in deploying secure multi-party computation in real-world applications. We will first give a brief overview of the current state of the art, bring out several shortcomings and address them.
The main contribution of this work is an end-to-end process description of deploying secure multi-party computation for the first large-scale registry-based statistical study on linked databases. Involving large stakeholders like government institutions introduces also some non-technical requirements like signing contracts and negotiating with the Data Protection Agency.

Links:
http://www.ut.ee/en/events/riivo-talviste-applying-secure-multi-party-computation-practice

Evaluation of Research in ICT in Estonia 2009–2014: Evaluation Report 5/2015

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Tallinn University of Technology:

4.4.15. Research Group: Faculty of Information Technology: Cyber Security
The group is led by Prof. Olaf Maennel. It is a very young and active group, started around 2013. The main interests of the group are in intrusion detection, testing security policies, and security simulation exercises. They have gained a European FP7 project on E-Crime. The group is still establishing itself in research and its activities are promising. The number and quality of publications is still limited and should be increased. This can be done since the leader of the group is well cited. Assessment: The panel judges the research to be of high international level. The overall evaluation of the group is good.

University of Tartu:

4.6.10. Research Group: Institute of Computer Science: Cryptography and Theoretical Computer Science
This group represents a number of subunits, with 6 topics led by 5 lead PIs (Sven Laur, Helger Lipmaa, Vitaly Skachek, Dirk Oliver Theis, Dominique Unruh). The group was restructured in 2011 with the recruitment of Unruh and Lipmaa. The group addresses six key research topics, namely classical cryptography, quantum cryptography, coding theory, combinatorics and algorithms, security, and verification of cryptography. All topics are related to computer security.
The research highlights include quantum proofs of knowledge, privacy-preserving data-mining, efficient non-interactive zero-knowledge proofs, communication complexity and the rank of matrices, and permutation codes. The group claims 8 level 1.1 publications, which seems a bit low. However, it is also a bit misleading since their list of 30 best papers includes 11 articles in top or at least internationally well recognized journals (J Cryptology, European J Combinatorics, IEEE Tr Information Theory, IEEE J selected areas in communication, Theoretical Computer Science, Journal of Computer Security, Bioinformatics, European J. Operations Research), besides 7 papers in the very best conferences (FOCS, Crypto, Eurocrypt, ICALP). Remaining top 30 items are papers in more specialized cryptography and security venues like ACM CCS, PKC, SCN, CSF, Eurocomb. Publication rate of top level papers has increased significantly over the evaluation period.
Many of the students (10+) are working in related industrial SMEs such as Cybernetica. They are contributing to several practical applications such as e-voting. The group is recommended to keep its current high quality and volume of output, and to develop some additional internationally financed projects. Based on the evidence, panel judges the research to be of high international level. Because of the strong upward trend the overall evaluation of the group is excellent.

Links:
http://www.etag.ee/wp-content/uploads/2012/05/Evaluation_raport2015veeb.pdf