Audit of Gossipsub v1.1 Protocol Design + Implementation for Protocol Labs

# Introduction In early June, our team completed a thorough and comprehensive review of the Gossipsub v1.1 protocol design and implementation for Protocol Labs. This security audit was particularly interesting as v1.1 brings with it a series of notable and important updates that weren’t present in v1.0, including efforts to harden and increase the security …

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Audit of Ethereum Foundation’s Node Discovery Protocol

The Ethereum Foundation requested that Least Authority perform a security audit of the next generation Node Discovery Protocol being developed for the Ethereum P2P network stack. The following components were considered in scope:  Node Discovery Protocol v5 – Specification Node Discovery Protocol v5 – Theory Node Discovery Protocol v5 – Wire Protocol   Our final …

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Introducing P4: Private Periodic Payment Protocol

Least Authority has recently designed a protocol called the Private Periodic Payment Protocol, or P4, which aims to define the way in which subscription services can be funded using end-to-end private cryptocurrency payments. P4 incorporates the use of Zcash shielded transactions for private payments and leverages the Tor anonymity network’s onion services to radically reduce the amount of personally identifiable information (PII) available to merchants. In addition, P4 introduces…