98 citations · 416 across the 29 of their papers we have counts for
11 papers · 1 filter
Securing Password Authentication for Web-based Applications
Teik Guan Tan, Pawel Szalachowski, Jianying Zhou
The use of passwords and the need to protect passwords are not going away. The majority of websites that require authentication continue to support password authentication. Even hi…
Exploring HTTPS Security Inconsistencies: A Cross-Regional Perspective
Eman Salem Alashwali, Pawel Szalachowski, Andrew Martin
If two or more identical HTTPS clients, located at different geographic locations (regions), make an HTTPS request to the same domain (e.g. example.com), on the same day, will they…
BBB-Voting: 1-out-of-k Blockchain-Based Boardroom Voting
Sarad Venugopalan, Ivan Homoliak, Zengpeng Li +1
Voting is a means to agree on a collective decision based on available choices (e.g., candidates), where participants agree to abide by their outcome. To improve some features of e…
Decentralized Lightweight Detection of Eclipse Attacks on Bitcoin Clients
Bithin Alangot, Daniel Reijsbergen, Sarad Venugopalan +1
Clients of permissionless blockchain systems, like Bitcoin, rely on an underlying peer-to-peer network to send and receive transactions. It is critical that a client is connected t…
Password-authenticated Decentralized Identities
Pawel Szalachowski
Password-authenticated identities, where users establish username-password pairs with individual servers and use them later on for authentication, is the most widespread user authe…
LaKSA: A Probabilistic Proof-of-Stake Protocol
Daniel Reijsbergen, Pawel Szalachowski, Junming Ke +2
We present Large-scale Known-committee Stake-based Agreement (LaKSA), a chain-based Proof-of-Stake protocol that is dedicated, but not limited, to cryptocurrencies. LaKSA minimizes…
AQUAREUM: Non-Equivocating Censorship-Evident Centralized Ledger with EVM-Based Verifiable Execution using Trusted Computing and Blockchain
Ivan Homoliak, Mario Larangeira, Martin Peresini +1
Distributed ledger systems (i.e., blockchains) have received a lot of attention. They promise to enable mutually untrusted participants to execute transactions while providing the…
A First Look into DeFi Oracles
Bowen Liu, Pawel Szalachowski, Jianying Zhou
Recently emerging Decentralized Finance (DeFi) takes the promise of cryptocurrencies a step further, leveraging their decentralized networks to transform traditional financial prod…
SmartCert: Redesigning Digital Certificates with Smart Contracts
Pawel Szalachowski
The Transport Layer Security (TLS) protocol and its public-key infrastructure (PKI) are widely used in the Internet to achieve secure communication. Validating domain ownership by…
SMACS: Smart Contract Access Control Service
Bowen Liu, Siwei Sun, Pawel Szalachowski
Although blockchain-based smart contracts promise a ``trustless'' way of enforcing agreements even with monetary consequences, they suffer from multiple security issues. Many of th…
Fail-safe Watchtowers and Short-lived Assertions for Payment Channels
Bowen Liu, Pawel Szalachowski, Siwei Sun
The recent development of payment channels and their extensions (e.g., state channels) provides a promising scalability solution for blockchains which allows untrusting parties to…