qryptr - airgapped secure hardware messenger (WHY2025)

Are you a smartphone user worried about spyware, advanced actors, backdoors, zero-days or side-channel attacks? These routinely bypass end-to-end encryption through keyloggers, screen capture and compromised keys. Smartphones are part of complex ecosystems with dozens of hardware and software components and remain vulnerable despite vendor and political efforts. We introduce a simple, offline, airgapped device to counter such threats. Checkout www.qryptr.com and github.com/gappuser/qryptr Show-and-tell of qryptr, the completely open-source secure messaging device. Checkout https://github.com/gappuser/qryptr and https://qryptr.com Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://program.why2025.org/why2025/talk/YEN87P/