P
Philipp Jovanovic
Researcher at University College London
Publications - 55
Citations - 3143
Philipp Jovanovic is an academic researcher from University College London. The author has contributed to research in topics: Computer science & Block cipher. The author has an hindex of 20, co-authored 47 publications receiving 2262 citations. Previous affiliations of Philipp Jovanovic include University of Passau & École Normale Supérieure.
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Proceedings ArticleDOI
OmniLedger: A Secure, Scale-Out, Decentralized Ledger via Sharding
Eleftherios Kokoris-Kogias,Philipp Jovanovic,Linus Gasser,Nicolas Gailly,Ewa Syta,Bryan Ford +5 more
TL;DR: OmniLedger ensures security and correctness by using a bias-resistant public-randomness protocol for choosing large, statistically representative shards that process transactions, and by introducing an efficient cross-shard commit protocol that atomically handles transactions affecting multiple shards.
Proceedings Article
Enhancing Bitcoin Security and Performance with Strong Consistency via Collective Signing
Eleftherios Kokoris-Kogias,Philipp Jovanovic,Nicolas Gailly,Ismail Khoffi,Linus Gasser,Bryan Ford +5 more
TL;DR: This paper introduces ByzCoin, a novel Byzantine consensus protocol that leverages scalable collective signing to commit Bitcoin transactions irreversibly within seconds, and achieves a throughput higher than PayPal currently handles, with a confirmation latency of 15-20 seconds.
Proceedings ArticleDOI
Keeping Authorities "Honest or Bust" with Decentralized Witness Cosigning
Ewa Syta,Iulia Tamas,Dylan Visher,David Isaac Wolinsky,Philipp Jovanovic,Linus Gasser,Nicolas Gailly,Ismail Khoffi,Bryan Ford +8 more
TL;DR: CoSi, a scalable witness cosigning protocol ensuring that every authoritative statement is validated and publicly logged by a diverse group of witnesses before any client will accept it, is introduced, offering the first transparency mechanism effective against persistent man-in-the-middle attackers.
Proceedings ArticleDOI
Scalable Bias-Resistant Distributed Randomness
Ewa Syta,Philipp Jovanovic,Eleftherios Kokoris Kogias,Nicolas Gailly,Linus Gasser,Ismail Khoffi,Michael J. Fischer,Bryan Ford +7 more
TL;DR: This paper proposes two large-scale distributed protocols, RandHound and RandHerd, which provide publicly-verifiable, unpredictable, and unbiasable randomness against Byzantine adversaries.