Three CROSSING papers accepted at top conferences IEEE S&P and ACM CCS

2018/07/30

Three CROSSING papers accepted at top conferences IEEE S&P and ACM CCS

Success for researchers of Applied Cryptography group

Three papers from the group of CROSSING-PI Prof. Sebastian Faust (Applied Cryptography) have been accepted to the the top conferences IEEE S&P and ACM CCS.

Perun: Virtual Payment Hubs over Cryptocurrencies
Stefan Dziembowski, Lisa Eckey, Sebastian Faust und Daniel Malinowski
In: IEEE Symposium on Security and Privacy (S&P), 2019

In this work, we introduce Perun, a system that combines payment channels allowed on cryptocurrencies. We present a new technique called “virtual payment channels” which avoids interaction with intermediaries for every single payment.

Foundations of State Channel Networks
Stefan Dziembowski, Sebastian Faust und Kristina Hostakova
In: 25th ACM Conference on Computer and Communications Security (CCS), 2018

An extension of virtual payment networks to cryptocurrencies are so-called state-channel networks. In addition to simple virtual off-chain payments, they enable the execution of complex smart contracts in dicrect channels and channel networks. In this work, we give a first full specification for general state channel networks. Moreover, we provide formal security definitions and develop security proofs showing that our construction satisfies security against powerful adversaries.

FairSwap: How to fairly exchange digital goods
Stefan Dziembowski, Lisa Eckey und Sebastian Faust
In: 25th ACM Conference on Computer and Communications Security (CCS), 2018

In this paper we introduce FairSwap – a new protocol for a fair exchange of digital goods over smart contracts. Our solution has two distinctive features that make it particularly interesting for large files: the cost of running the smart contract on the blockchain is minimal, and instead of expensive cryptographic tools such as zero-knowledge proofs, simple hashing techniques are sufficient.

IEEE S&P will be held May 20-22, 2019 in San Francisco, USA. ACM CCS 2018 is taking place October 15-19 in Toronto, Canada.

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