10 citations · 31 across the 20 of their papers we have counts for
8 papers · 1 filter
Exploiting Satellite Broadcast despite HTTPS
Nikos Fotiou, Vasilios A Siris, George C. Polyzos +3
HTTPS enhances end-user privacy and is often preferred or enforced by over-the-top content providers, but renders inoperable all intermediate network functions operating above the…
Enabling Opportunistic Users in Multi-Tenant IoT Systems using Decentralized Identifiers and Permissioned Blockchains
Nikos Fotiou, Iakovos Pittaras, Vasilios A. Siris +1
In this work, we leverage advances in decentralized identifiers and permissioned blockchains to build a flexible user authentication and authorization mechanism that offers enhance…
Secure Open Federation of IoT Platforms Through Interledger Technologies -- The SOFIE Approach
Dmitrij Lagutin, Francesco Bellesini, Tommaso Bragatto +10
The lack of interoperability among IoT platforms has led to a fragmented environment, where the users and society as a whole suffer from lock-ins, lack of privacy, and reduced func…
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…