zkLedger: privacy-preserving auditing for distributed ledgers

zkLedger: privacy-preserving auditing for distributed ledgers Narula et al., NSDI'18 Somewhat similarly to Solidus that we looked at late last year, zkLedger (presumably this stands for zero-knowledge Ledger) provides transaction privacy for participants in a permissioned blockchain setting. zkLedger also has an extra trick up its sleeve: it provides rich and fully privacy-preserving auditing capabilities. ... Continue Reading

Settling payments fast and private: efficient decentralized routing for path-based transactions

Settling payments fast and private: efficient decentralized routing for path-based transactions Roos et al., NDSS’18 Peer-to-peer path-based-transaction (PBT) networks such as the Lightning Network address scalability, efficiency, and interoperability concerns with blockchains through off-chain transactions. They work by establishing decentralised chains of participants through which payments are routed. A PBT network builds on top of ... Continue Reading

SoK: Research perspectives and challenges for Bitcoin and cryptocurrency – Part II

SoK: Research perspectives and challenges for Bitcoin and cryptocurrency Bonneau et al., IEEE Security and Privacy, 2015 Part 2 : modifications, extensions, anonymity. Here’s the map for what we’ll be talking about today. We’ll discuss considerations for modifying and/or upgrading the way Bitcoin works, the world of altcoins, and uses beyond cryptocurrency. We’ll also touch ... Continue Reading