Enabling double-spending detection in a pair-based ledger

The development of blockchain, along with the creation of Bitcoin, opened the road to the first digital currency that is secure against double-spending without the need for a trusted authority or centralized server. The architecture of traditional blockchain structures like the one used in Bitcoin is, however, not very scalable because of its...

Interpreting Information of Deep Neural Networks for Profiled Side Channel Analysis

Security has become ever more important in today's quickly growing digital world as the number of digital assets has quickly grown. Our thesis focuses on devices that compute a secure cryptographic operation such that information can be communicated or authenticated. The attack vector utilized is known as Profiled Side-Channel Analysis (SCA)...

Privacy-preserving consensus averaging

Consensus problem has been a topic of interest for many research areas allowing multiple agents to reach an agreement through local information exchange. The explicit share of the state variables, however, may cause privacy issues due to the confidentiality of the initial values. In this work, asynchronous privacy-preserving consensus average...

Analyzing the Resilience of Modern Smartphones Against Fault Injection Attacks

The costs and damages that result from cyber security weaknesses are increasing year by year. The cybercrime economy has grown to acquire $600 billion in profits every year, nearly one percent of the global GDP according to a study made by The Center for Strategic and International Studies (CSIS), in collaboration with McAfee. This is likely to...

Single Scattering in Scenes containing Semi-Transparent Objects and Participating Media: Researching, solving and evaluating single scattering and transparency as a single problem

Volumetric light scattering caused by participating media has been and still is a complicated, but visually pleasing lighting effect that increases the sense of realism of digital scenes tremendously. Various solutions to rendering these effects in real-time exist, basing themselves upon the single scattering approximation. Transparency is...

Permission-less banking API

In this document we present an in-depth vulnerability assessment of the HSBC banking system. Going beyond prior work, we investigate the full stack down to the Java bytecode level and further analyze its 3 key platforms: Android OS, IOSand online banking. During the process we analyze their main security feature,OTP generation algorithm and...

A Blockchain Consensus Protocol With Horizontal Scalability

Blockchain systems have the potential to decentralise many traditionally centralised systems. However, scalability remains a key challenge. Without a horizontally scalable solution, where performance increases by adding more nodes to the system, blockchain systems remain unsuitable for ubiquitous use. We design a novel blockchain system called...