The warrant canary is signed using a PGP key. Please install GnuPG if you haven't already.
To verify the signature:
- Download and import the IVPN public key from https://www.ivpn.net/resources/pubkey.txt.
gpg --import pubkey.txt
- Download the latest canary from https://www.ivpn.net/resources/canary.txt and verify.
gpg --verify canary.txt
You should see a message similar to below confirming the signature is good
gpg: Signature made Tue Nov 4 16:23:00 2014 CET using RSA key ID B647BA69 gpg: Good signature from "IVPN Administrator