• Publications
  • Influence
Hyperledger fabric: a distributed operating system for permissioned blockchains
TLDR
Fabric is a modular and extensible open-source system for deploying and operating permissioned blockchains and one of the Hyperledger projects hosted by the Linux Foundation. Expand
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Evaluating User Privacy in Bitcoin
TLDR
We evaluate the privacy that is provided by Bitcoin when it is used to support the daily transactions of individuals in a university setting. Expand
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Double-spending fast payments in bitcoin
TLDR
We show that, unless appropriate detection techniques are integrated in the current Bitcoin implementation, double-spending attacks on fast payments succeed with overwhelming probability and can be mounted at low cost. Expand
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Reputation Systems for Anonymous Networks
TLDR
We present a reputation scheme for a pseudonymous peer-to-peer (P2P) system in an anonymous network. Expand
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A Secure Data Deduplication Scheme for Cloud Storage
TLDR
We present Eµ, a novel threshold cryptosystem that guarantees semantic security for unpopular data and provides weaker security for popular data. Expand
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Misbehavior in Bitcoin: A Study of Double-Spending and Accountability
TLDR
We show that unless new detection techniques are integrated in the Bitcoin implementation, double-spending attacks on fast payments succeed with considerable probability and can be mounted at low cost. Expand
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Channels: Horizontal Scaling and Confidentiality on Permissioned Blockchains
TLDR
In this paper, we look into the challenges of enabling horizontal scaling and providing privacy in the permissioned setting. Expand
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Two Bitcoins at the Price of One? Double-Spending Attacks on Fast Payments in Bitcoin
TLDR
We analyze the security of using Bitcoin for fast payments, where the time between the exchange of currency and goods is short (i.e., in the order of few seconds). Expand
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APOD: Anonymous Physical Object Delivery
TLDR
In this paper, we present a fair delivery service system with guaranteed customer anonymity and merchant-customer unlinkability, with reasonable assumptions about the threat model. Expand
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Erasure-Coded Byzantine Storage with Separate Metadata
TLDR
This paper introduces an asynchronous, wait-free distributed BFT erasurecoded storage protocol with optimal resilience. Expand
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