6 papers
SCRamble: Adaptive Decentralized Overlay Construction for Blockchain Networks
Evangelos Kolyvas, Alexandros Antonov, Spyros Voulgaris
Despite being under development for over 15 years, transaction throughput remains one of the key challenges confronting blockchains, which typically has a cap of a limited number o…
OAuth 2.0 authorization using blockchain-based tokens
Nikos Fotiou, Iakovos Pittaras, Vasilios A. Siris +2
OAuth 2.0 is the industry-standard protocol for authorization. It facilitates secure service provisioning, as well as secure interoperability among diverse stakeholders. All OAuth…
Secure IoT access at scale using blockchains and smart contracts
Nikos Fotiou, Iakovos Pittaras, Vasilios A. Siris +2
Blockchains and smart contracts are an emerging, promising technology, that has received considerable attention. We use the blockchain technology, and in particular Ethereum, to im…
Interledger Smart Contracts for Decentralized Authorization to Constrained Things
Vasilios A. Siris, Dimitrios Dimopoulos, Nikos Fotiou +2
We present models that utilize smart contracts and interledger mechanisms to provide decentralized authorization for constrained IoT devices. The models involve different tradeoffs…
OAuth 2.0 meets Blockchain for Authorization in Constrained IoT Environments
Vasilios A. Siris, Dimitrios Dimopoulos, Nikos Fotiou +2
We present models for utilizing blockchain and smart contract technology with the widely used OAuth 2.0 open authorization framework to provide delegated authorization for constrai…
Dietcoin: shortcutting the Bitcoin verification process for your smartphone
Davide Frey, Marc X. Makkes, Pierre-Louis Roman +2
Blockchains have a storage scalability issue. Their size is not bounded and they grow indefinitely as time passes. As of August 2017, the Bitcoin blockchain is about 120 GiB big wh…