Reach
Cryptographic Infrastructure for Anonymous Communication
Reach addresses a gap in privacy-preserving communication infrastructure for scenarios involving surveillance risks, device seizure threats, and the need for safe ongoing dialogue between anonymous individuals and trusted groups. The open-source platform uses ECDH-based Oblivious Message Retrieval to enable anonymous individuals to establish first-contact and maintain bidirectional communication while preventing semi-honest infrastructure providers and third-party observers from learning communication patterns. By implementing asymmetric forward secrecy, organisations that deploy Reach maintain full forward secrecy with persistent keys, while anonymous parties achieve privacy and confidentiality without storing or outsourcing any cryptographic material. Reach delivers self-hostable infrastructure and formally verified cryptographic schemes for the broader privacy ecosystem.
- The project's own website: https://codeberg.org/reachable-systems/reach
This project was funded through the NGI0 Commons Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101135429. Additional funding is made available by the Swiss State Secretariat for Education, Research and Innovation (SERI).
