Investigation on lattices- and code-based post-quantum signature cryptosystems

As quantum-resistant cryptosystems will soon benecessary, the NIST has organized a contest aim-ing to its standardization. The proposed schemesmust be evaluated and thoroughly investigated tonotably ensure their security and compare their per-formance. This paper will explore various lattices-based (pqNTRUSign, BLISS, Dilithium, Falcon,qTesla)...

Investigation on post-quantum digital signature systems based on multivariate equations

The NIST Post-Quantum Cryptography standardisation process has called for new algorithms, for the purpose of finding and standardising new cryptographic algorithms, able to withstand attacks enabled by future quantum processing progress. Digital signature schemes are fundamental for validating authenticity and integrity of digital documents. In...

Investigation on NIST post-quantum lattice-based encryption schemes

In the last decade, development in quantum computing has threatened the security of current public-key cryptography. For this reason, the American National Institute of Standards and Technology (NIST) has organized a competition-like process to<br/>standardize new quantum-resistant public-key encryption and digital signature schemes. This...

An evaluation of the reentrancy vulnerability on GoQuorum-based smartcontracts

Within the context of the Ethereum blockchain protocol, reentrancy is a well-known and well-researched smart contract vulnerability. However, when considering GoQuorum, an Ethereum soft fork, barely any research discussing smart contract vulnerabilities exists. This report aims to partly fill this research gap by evaluating the reentrancy smart...

Revisiting smart contract vulnerabilities in Hyperledger Fabric

Hyperledger Fabric is a permissioned enterprise blockchain allowing organizations to collaborate and automate processes via smart contracts. However, these contracts could contain security vulnerabilities leading to unexpected behavior or other negative consequences. Therefore, this study takes a closer look at three reported smart contract...

Attacks on Searchable Symmetric Encryption Systems: Revisiting Similar-data and File Injection Attacks

The amount of data individuals create keeps increasing every year to the point that the data cannot be stored on a single device anymore. Cloud storage provides a solution for this problem, but not everybody wants the cloud storage service providers to peek at their data and they thus encrypt their data before storing it on the service provider...