Registration without a phone number on Signal will use zero-knowledge proofs
Summary
The article discusses Signal's plan to allow registration without a phone number using zero-knowledge proofs (ZKPs). It explains how ZKPs can verify credentials (like username constraints) and authenticate users without revealing personal data, and it covers community debate on metadata leakage and design choices for numberless accounts, including GitHub commits and feature work. The piece highlights privacy and security trade-offs and ongoing work to implement numberless registration while mitigating abuse.