• Publications
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Zerocash: Decentralized Anonymous Payments from Bitcoin
TLDR
We construct a full-fledged ledger-based digital currency with strong privacy guarantees, comparable with plain Bit coin. Expand
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Zerocoin: Anonymous Distributed E-Cash from Bitcoin
TLDR
In this paper we propose Zerocoin, a cryptographic extension to Bitcoin that augments the protocol to allow for fully anonymous currency transactions. Expand
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Charm: a framework for rapidly prototyping cryptosystems
TLDR
We describe Charm, an extensible framework for rapidly prototyping cryptographic systems, including some new ones that, to our knowledge, have never been built in practice. Expand
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Bolt: Anonymous Payment Channels for Decentralized Currencies
TLDR
We introduce techniques for constructing anonymous payment channels, including a technique that allows payments via untrusted intermediaries. Expand
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Forward Secure Asynchronous Messaging from Puncturable Encryption
TLDR
In this paper we investigate new mechanisms for achieving forward secure encryption in store and forward messaging systems. Expand
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Accountable Privacy for Decentralized Anonymous Payments
TLDR
We propose an initial approach to addressing this issue by adding privacy preserving policy-enforcement mechanisms that guarantee regulatory compliance, allow selective user tracing, and admit tracing of tainted coins. Expand
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Fairness in an Unfair World: Fair Multiparty Computation from Public Bulletin Boards
TLDR
We present a new model for achieving fairness in MPC against dishonest majority by using public bulletin boards implemented via existing infrastructure such as blockchains or Google's certificate transparency logs. Expand
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Decentralized Anonymous Credentials
TLDR
We propose a novel anonymous credential scheme that eliminates the need for a trusted credential issuer and provides a proof of security for a basic anonymous credential system that allows users to make flexible identity assertions with strong privacy guarantees without relying on trusted parties. Expand
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Updatable and Universal Common Reference Strings with Applications to zk-SNARKs
TLDR
Zk-SNARKs embed a secret trapdoor in a relation-dependent common reference strings (CRS). Expand
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ZEXE: Enabling Decentralized Private Computation
TLDR
We design, implement, and evaluate ZEXE, a ledger-based system where users can execute offline computations and subsequently produce transactions, attesting to the correctness of these computations, that satisfy two main properties. Expand
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