Cryptocurrencies enable users to transact with each other without relying on trusted parties or intermediaries. These transactions are recorded in an immutable, publicly verifiable ledger. Due to the ledger's transparent nature, privacy is notably reduced. If the link between users' public key and their physical identity is exposed, their pseudonymity is lost. One way to increase users' privacy is to deploy coin mixing services. In this paper, we present MixEth, which is a trustless coin mixing service. MixEth is more efficient than any proposed trustless coin tumbler. It requires only 3 on-chain transactions at most per user and 1 off-chain. It achieves strong notions of anonymity and is able to resist denial-of-service attacks. MixEth is a joint work of Istvan Andras Seres, Dániel A. Nagy, Chris Buckland and Péter Burcsi. More info here: https://github.com/seresistvanandras/MixEth
State channels provide a way of scaling blockchain applications to high throughput. In our second talk we'll briefly cover how state channels work technically, what they can achieve and what their limitations are. Given these limitations we'll discuss how an application can be adapted to run in a state channel, and use MixEth as an example to explore what this means in practice.
18:00 Doors Open
18:30 Opening notes and announcements
18:40 Istvan Andras Seres - MixEth: efficient, trustless coin mixing service for Ethereum
19:20 Chris Buckland - Channelising MixEth with the Counterfactual framework
20:00 Open Discussion
Istvan Andras Seres is passionate about Cryptography, Cryptocurrencies and Security&Privacy in general. Currently he researches methods for unbiasable on-chain pseudo number generation and protocols to enhance transaction privacy in Ethereum. Istvan did his Bachelor in Mathematics at ELTE, Budapest. He studied Cybersecurity and Cryptography during his Master Studies in Trento (Italy) and Saarbrücken (Germany). He wrote his Master Thesis about Ethereum Smart Contract Security under the supervision of Matteo Maffei (TU Wien).
Blockchain and state channel researcher at PISA Research