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Yiannis Psaras

Research Scientist / ResNetLab

Education

PhD in Computer Networks, 2008

Democritus University of Thrace

Yiannis has a long-standing interest in Information- or Content-Centric Networks with several noteworthy contributions in the area. He has extensive background in several of the architectural and protocol design aspects of Information-Centric Networks having run several projects over the last decade. He sees IPFS as a deployment of ICN in the wild with a huge user-base and is therefore excited to contribute his past experience into the protocol design choices of a live network. Yiannis is active in the ICN research community and the IRTF ICNRG. In the past, he has worked in areas related to congestion control, routing, caching, naming and resource allocation of current and future fixed and mobile Internet architectures. He believes that decentralisation of Internet services will be demanded through the need to deploy services at the edge of the network, aka edge-computing. A brief thesis on this together with related works can be found here: https://www.ee.ucl.ac.uk/~ipsaras/ddec.html

Areas of Expertise

Networking

Latest work

2020.11.25 / Posts

IEEE/IFIP CNSM 2020 - The InterPlanetary File System and the Filecoin Network

ResNetLab was invited to present a 3.5 hour tutorial at one of the biggest conferences in the “NetMan” community, the 16th International Conference on Network and Service Management. We were impressed by the quality of talks, keynotes, workshops, and tutorials presented during the conference.

2020.11.3 / Posts

"Two ears, one mouth": how to leverage bitswap chatter for faster transfers

As part of ResNetLab’s research endeavour to drive speed-ups on file transfers, Beyond Swapping Bits, we present a new contribution to IPFS Bitswap protocol. We argue that Bitswap is currently discarding a wealth of information that could be used to its benefit, improving retrieval success and minimizing the latency to retrieve content.

2020.10.29 / Posts

Honey, I shrunk our libp2p streams

Today we’re excited to share the story of how we decided to explore compression for libp2p streams and ended up achieving up to a 75% decrease in bandwidth use when performing an IPFS file exchange.

2020.10.6 / Posts

GossipSub: An attack-resilient messaging-layer protocol for public blockchains

Securing permissionless networks is the bane of open networks, starting with the Internet and every overlay network that operates over it. This challenge has existed from the early days of the Internet to the current Web 3.

2020.7.23 / Posts

How content addressing can solve streaming challenges as networks are overloaded

Given the mass migration to remote work we’ve seen in recent months, you’d think the internet would be collapsing under the added strain. Yet precisely the opposite has happened. As experts have observed, the internet isn’t buckling under added traffic; it’s thriving.

2020.7.6 / Publications

GossipSub: Attack-resilient message propagation in the Filecoin and ETH2.0 networks

Permissionless blockchain environments necessitate the use of a fast and attack-resilient message propagation protocol for Block and Transaction messages to keep nodes synchronised and avoid forks. We present GossipSub, a gossip-based pubsub protocol, which, in contrast to past pubsub protocols, incorporates resilience against a wide spectrum of attacks.

2020.7.1 / Posts

IEEE/IFIP DSN 2020 - The InterPlanetary File System and the Filecoin Network

ResNetLab was invited to present “The InterPlanetary File System and the Filecoin Network” in a 3-hour tutorial at the IEEE/IFIP International Conference on Dependable Systems and Networks! The conference, now in its 50th edition, has an established track record of top-quality research contributions, and is one of the oldest conferences in its subject area.

2020.6.8 / Posts

IPFS talk at the IRTF Decentralised Internet Infrastructure Research Group meeting

ResNetLab was invited to meet with the Decentralised Internet Infrastructure Research Group (DINRG) of the Internet Research Task Force (IRTF) to present and discuss the Software Architecture of the IPFS protocol.

2020.5.18 / Posts

NDN Seminar: a high-level overview of the InterPlanetary File System

ResNetLab was invited to present the “High-Level Overview of the IPFS Architecture” to the Named Data Networking consortium!

2020.5.7 / Posts

Next Generation Networks (NGN) group talk: A high-level overview of the InterPlanetary File System

The Next Generation Networks (NGN) group recently invited the Resilient Networks Lab (ResNetLab) to present a tutorial on IPFS. NGN is a vibrant group of academics, industry researchers and engineers working in the general area of — you guessed it — next-generation networks.

2020.5.3 / Posts

IEEE ICBC 2020: The InterPlanetary File System and the Filecoin Network

ResNetLab presented at one of the most prominent conferences in the area of Distributed Ledger Technologies: the IEEE International Conference on Blockchain and Cryptocurrencies! IEEE ICBC 2020 took place remotely, was well-attended, and had an exciting programme both in terms of tutorials during the first day and invited talks during the main conference, where Vitalik Buterin delivered the keynote speech.

2020.4.18 / Publications

Gossipsub-v1.1 evaluation report

Permissionless blockchain environments necessitate the use of a fast and attack-resilient message propagation protocol for Block and Transaction messages to keep nodes synchronised and avoid forks. We present GossipSub, a gossip-based pubsub protocol, which, in contrast to past pubsub protocols, incorporates resilience against a wide spectrum of attacks.

2019.12.30 / Posts

A new lab for resilient networks research

Resiliency is at the core of systems that are capable of standing the test of time, providing unshakable access for the many generations to come. A resilient system or network is fundamentally uncompromised by an isolated failure or network split.