Data privacy is a key concern for smart contracts handling sensitive data. The existing work
zkay addresses this concern by allowing developers without cryptographic expertise to …

The privacy concern in smart contract applications continues to grow, leading to the
proposal of various schemes aimed at develo** comprehensive and universally …

A blockchain is a data structure consisting of a list of blocks containing transactions and
maintained by a network of nodes in a decentralized manner. In permissionless blockchains …

Traditional blockchain systems execute program state transitions on-chain, requiring each
network node participating in state-machine replication to re-compute every step of the …

Abstract The proliferation of Decentralised Finance (DeFi) and Decentralised Autonomous
Organisations (DAO), which in current form are exposed to front-running of token …

Despite the great potential and flexibility of smart contract-enabled blockchains, building
privacy-preserving applications using these platforms remains an open question. Existing …

From weak clients outsourcing computational tasks to more powerful machines, to
distributed blockchain nodes needing to agree on the state of the ledger in the presence of …

Privacy concerns prevent the adoption of smart contracts in sensitive domains incompatible
with the public nature of shared ledgers. We present Zapper, a privacy-focused smart …

The security and usability of cryptocurrencies and other blockchain-based applications
depend on the secure management of cryptographic keys. However, current approaches for …

In a competitive market, online auction systems enable optimal trading of digital products
and services. Bidders can participate in existing blockchain-based auctions while protecting …