Скачать или смотреть PairSonic: Helping Groups Securely Exchange Contact Information | CSCW 2024

In this demo at CSCW 2024, I explain the PairSonic protocol and our implementation. PairSonic is an open-source smartphone app that enables two or more users meeting in person to spontaneously exchange or verify their contact information. PairSonic supports the secure exchange of cryptographic public keys, which is crucial for protecting end-to-end encrypted communication, e.g., in messenger apps (so called authentication ceremony).

PairSonic simplifies the pairing process by automating the tedious verification tasks of previous methods through an acoustic out-of-band channel using smartphones' built-in hardware. It does not rely on external key management infrastructure, prior associations, or shared secrets.

Florentin Putz, Steffen Haesler, and Matthias Hollick. Sounds Good? Fast and Secure Contact Exchange in Groups. Proc. ACM Hum.-Comput. Interact. 8, CSCW2, 2024. https://doi.org/10.1145/3686964

Check out the source code on GitHub: https://github.com/seemoo-lab/pairsonic

Further information and paper PDFs: https://fputz.net/pairsonic

00:00 Intro
00:29 Demo
01:33 Security
02:28 Use Case: Protect E2EE Communication
03:28 Usability
03:58 Decentralized
04:25 Compatibility
04:43 Outro