1 citations · 1 across the 5 of their papers we have counts for
8 papers · 1 filter
Enabling self-verifiable mutable content items in IPFS using Decentralized Identifiers
Nikos Fotiou, Vasilios A. Siris, George C. Polyzos
In IPFS content identifiers are constructed based on the item's data therefore the binding between an item's identifier and its data can be deterministically verified. Nevertheless…
Capability-based access control for multi-tenant systems using OAuth 2.0 and Verifiable Credentials
Nikos Fotiou, Vasilios A. Siris, George C. Polyzos
We propose a capability-based access control technique for sharing Web resources, based on Verifiable Credentials (VCs) and OAuth 2.0. VCs are a secure means for expressing claims…
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…
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 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…