Search results for "salaus"
showing 8 items of 8 documents
Preventing reverse engineering of native and managed programs
2015
One of the important aspects of protecting software from attack, theft of algorithms, or illegal software use is eliminating the possibility of performing reverse engineering. One common method used to deal with these issues is code obfuscation. However, it is proven to be ineffective. Code encryption is a much more effective means of defying reverse engineering, but it requires managing a cryptographic key available to none but the permissible users. The thesis presents a system for managing cryptographic keys in a protected environment and supporting execution of encrypted code. The system has strong security guarantees. In particular, the cryptographic keys are never stored on the target…
Non-commutative Ring Learning with Errors from Cyclic Algebras
2022
AbstractThe Learning with Errors (LWE) problem is the fundamental backbone of modern lattice-based cryptography, allowing one to establish cryptography on the hardness of well-studied computational problems. However, schemes based on LWE are often impractical, so Ring LWE was introduced as a form of ‘structured’ LWE, trading off a hard to quantify loss of security for an increase in efficiency by working over a well-chosen ring. Another popular variant, Module LWE, generalizes this exchange by implementing a module structure over a ring. In this work, we introduce a novel variant of LWE over cyclic algebras (CLWE) to replicate the addition of the ring structure taking LWE to Ring LWE by add…
Detection of distributed denial-of-service attacks in encrypted network traffic
2016
Tausta: Hajautetut palvelunestohyökkäykset ovat jo kaksi vuosikymmentä vanhoja. Useita strategioita on kehitetty taistelemaan niiden kasvavaa määrää vastaan vuosien varrella. Sovelluskerroksen protokollien hyökkäykset yleistyvät, ja niitä on hankalampi havaita. Nykyiset havainnointimenetelmät analysoivat tietoliikenteen piirteitä. Paketin sisältö on salattua SSL/TLS liikenteessä, josta syystä sitä ei voida analysoida. Tavoitteet: Tutkielma tarkastelee salatun liikenteen palvelunestohyökkäysten havaintometodien nykyistä tilaa. Tutkielma esittelee myös klusterointiin perustuvan menetelmän ja aikaisemman tutkimuksen kanssa vertailtavissa olevia simulaatiotuloksia. Metodit: Kirjoittaja laati ke…
An Efficient and Privacy-Preserving Blockchain-Based Authentication Scheme for Low Earth Orbit Satellite Assisted Internet of Things
2022
Recently, integrating satellite networks (e.g. Low-earth-orbit satellite constellation) into the Internet of Things (IoT) ecosystem has emerged as a potential paradigm to provide more reliable, ubiquitous and seamless network services. The LEO satellite networks serves as a key enabler to transform the connectivity across industries and geographical border. Despite the convenience brought from the LEO satellite networks, it arises security concerns, in which the essential one is to secure the communication between the IoT devices and the LEO satellite network. However, some challenges inheriting from the LEO satellite networks need to be considered : 1) the dynamic topology; 2) the resource…
Adopting encryption to protect confidential data in public clouds: A review of solutions, implementation challenges and alternatives
2015
A shift towards use of public cloud services is ongoing and more and more enterprises will start to use them in the near future. As public cloud services certainly promise to deliver many benefits, this new way of delivering services also introduces new types of risks. Due to the NSA’s surveillance programs, non-US enterprises need to reassess the risks of public cloud services provided by US companies and look for available solutions to protect their confidential data transferred and stored in the cloud. Encryption is seen as a solution to help enterprises full fill the requirements related to security and privacy, but is often challenging to implement. Encryption has its own security prob…
Effects of PSD2 on security architecture of mobile banking : a review of literature
2017
This thesis aims to find out the changes that the Payment Service Directive (PSD2) will bring to the security architecture of mobile banking. PSD2 will create a situation where security mechanisms are separated from the actual banking application. Payment service providers must provide their Application Programming Interface for third party developers to give them access to authentication of payment transactions. PSD2 requires payments service providers to offer strong customer authentication with separate authentication mechanism from the banking application. This thesis found that academic literature about the security architecture of mobile banking does not provide a model where a separa…
Encryption and Generation of Images for Privacy-Preserving Machine Learning in Smart Manufacturing
2023
Current advances in machine (deep) learning and the exponential growth of data collected by and shared between smart manufacturing processes give a unique opportunity to get extra value from that data. The use of public machine learning services actualizes the issue of data privacy. Ordinary encryption protects the data but could make it useless for the machine learning objectives. Therefore, “privacy of data vs. value from data” is the major dilemma within the privacy preserving machine learning activity. Special encryption techniques or synthetic data generation are being in focus to address the issue. In this paper, we discuss a complex hybrid protection algorithm, which assumes sequenti…
Compact Quantum Circuit Design of PUFFIN and PRINT Lightweight Ciphers for Quantum Key Recovery Attack
2023
Quantum computing plays a vital role in the next generation computing platforms as researchers have achieved quantum supremacy by proving that quantum computers can outperform classical computers. These high performance computers will pose a serious threat to the security of the conventional cryptographic algorithms. The secret key of the conventional cryptographic algorithms when implemented by quantum circuits can easily be recovered with the help of Grover key search algorithm. The Grover’s algorithm requires low cost quantum implementation of cryptographic algorithms in order to mount the quantum key recovery attack successfully. Hence the low cost quantum implementation of conventional…