Lab Name

Briolette

Short Description

Briolette is an experimental system for implementing offline-enabled digital currency with an opinionated security and privacy approach. In particular, it relies on the cryptographic properties of direct anonymous attestation (DAA) schemes to enable pseudonymous wallet identities, repeated offline peer-to-peer transactions with near-finality, and system-wide double spending detection and abuse response.

Scope of Lab

Briolette acts as a reference implementation and experimental framework for creating offline-enabled digital currencies that may be used like physical cash, in-person or online. Ideally, briolette will enable the exploration and definition of the best practices in the digital currency, identity, and cryptography space regardless of if it is used to inform the creation of a layer 2 payment system or a sovereign CBDC.

Beyond efficient, offline designs, briolette’s scope includes exploring means of excluding known-double spending wallets from the system, enabling different currency authorities to operate over the same ‘network’, protecting the online services from abuse using the same primitives used for transactional safety, and exploring system policies and mechanisms which automatically scale between widespread connectivity outages and operational maximum ‘disconnected’ times for client wallets. Additionally, the existence of this system and its design allows for the exploration of CBDC-specific policies, such as wallet transaction velocity.

Initial Committers

• https://github.com/redpig

Sponsor

N/A

Pre-existing repository

• https://github.com/google/briolette