Krypton Developer Tools
kr command line interface
kr enables SSH to authenticate with a key stored in a Krypton (iOS or Android) mobile app. kr runs as an SSH agent, called krd. When a Krypton private key operation is needed for authentication, krd routes this request to the paired mobile phone, where the user decides whether to allow the operation or not. The private key never leaves the phone.
kr also enables Git Commit/Tag signing with a key stored in Krypton. kr includes an interface to gpg, called krgpg, that can talk with git in order to pgp-sign git commits and tags.
Supported Operating Systems
kr currently supports MacOS (10.10+) and Linux (64 Bit) (Debian, RHEL, CentOS, Fedora with
curl https://krypt.co/kr | sh
Build Dependencies / Instructions
We use go modules for easy dependency management.
Install / Run From Source
make install make start kr pair
Security Disclosure Policy
Krypton follows a 7-day disclosure policy. If you find a security flaw,
please send it to
firstname.lastname@example.org encrypted to the PGP key with fingerprint
B873685251A928262210E094A70D71BE0646732C (find the full key here). We ask that you
delay publication of the flaw until we have published a fix, or seven days have
We are currently working on a new license for Krypton. For now, the code is released under All Rights Reserved.