Blockchains offer a decentralized, immutable and verifiable ledger that can record
transactions of digital assets, provoking a radical change in several innovative scenarios …

Bitcoin is the most widely known distributed, peer-to-peer payment network without
existence of a central authority. In Bitcoin, users do not use real names; instead …

We propose Bulletproofs, a new non-interactive zero-knowledge proof protocol with very
short proofs and without a trusted setup; the proof size is only logarithmic in the witness size …

We present Arbitrum, a cryptocurrency system that supports smart contracts without the
limitations of scalability and privacy of systems previous systems such as Ethereum …

Trading goods lies at the backbone of the modern economy and the recent advent of
cryptocurrencies has opened the door for trading decentralized (digital) assets: A large …

We propose a new class of post-quantum digital signature schemes that:(a) derive their
security entirely from the security of symmetric-key primitives, believed to be quantum …

We introduce FairSwap--an efficient protocol for fair exchange of digital goods using smart
contracts. A fair exchange protocol allows a sender S to sell a digital commodity x for a fixed …

As an attractive business model of cloud computing, outsourcing services usually involve
online payment and security issues. The mutual distrust between users and outsourcing …

We present a new succinct zero knowledge argument scheme for layered arithmetic circuits
without trusted setup. The prover time is O (C+ nlogn) and the proof size is O (D logC+ log 2 …

Thanks to the widespread deployment of TLS, users can access private data over channels
with end-to-end confidentiality and integrity. What they cannot do, however, is prove to third …