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Bitcoin for Signal - Private Messaging Needs Private Money.
Signal is a trusted messenger that enables private communication and aims to extend this privacy to financial transactions.
Signal initially integrated MobileCoin for payments, but it failed to gain significant adoption.
The proposed solution involves integrating Bitcoin with the Cashu protocol to enable private, peer-to-peer payments within Signal.
Cashu is a Chaumian ecash system that provides strong privacy and allows for instant, cheap payments, even for tiny amounts.
The Cashu protocol is open-source and not controlled by a single entity, allowing for community-driven development and implementation.
The Signal Cashu integration embeds a lightweight Cashu wallet directly into Signal, making Bitcoin payments as natural as sending a message.
Cashu uses blind signatures and other cryptographic techniques to ensure user privacy and unlinkability of transactions.
The Cashu protocol is defined by a set of open specifications called NUTs (Notation, Usage, and Terminology).
The proof-of-concept demonstrates that Bitcoin in Signal is technically feasible with Cashu, and the team seeks support and collaboration from the community and Signal itself.
Cashu aligns with Signal's privacy-first mission and could bring millions of potential new users, enhancing privacy for everyone.
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