Meet Beaver: A Decentralized Anonymous Marketplace

Kyle Soska, Albert Kwon, Nicolas Christin and Srinivas Devadas four students from Carnegie Mellon and MIT wrote a paper called “Beaver: A Decentralized Anonymous Marketplace with Secure Reputation.” The written theory has been the topic of discussion as it’s found its way across multiple cryptocurrency forums this week. The piece details a sophisticated marketplace with privacy centric features in mind that’s focused on immutable reputations based on free market associations.

The paper describes an anonymous market by establishing a reputation system that is resistant to Sybil attacks in regards to vendor feedback and keeping customers private. The students evaluate the “shortcomings” of some other decentralized marketplaces such as OpenBazaar (OB) and the Silk Road 1. Currently, the framework for the popular OpenBazaar network does not support privacy-centric techniques like Tor due to its UDP protocol the report states. Alongside this fault, other marketplaces and platforms could suffer from Sybil attacks. This means a user could create a significant group of manipulative identities to ensure they have a positive reputation. Beaver’s white paper states:  

“In this paper, we introduce a formal model for a decentralized anonymous marketplace (DAM), and design Beaver, a

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