Qryptr

As a a smartphone user you might be 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. Qryptr is a simple, offline, airgapped device to counter such threats. Plain text messages entered via its keyboard are ECC encrypted and displayed as QR codes. These QR codes can be photographed and shared using your smartphone. This method offers additional endpoint security as plaintext and cryptographic keys are kept physically separate from your smartphone.