What is a warrant canary?
A warrant canary is a posted document stating that an organization has not received any secret subpoenas during a specific period of time. If this document fails to be updated during the specified time then the user is to assume that the service has received such a subpoena and should stop using the service.
Warrant Canary Examples:
- https://proxy.sh/canary
- https://www.ivpn.net/resources/canary.txt
- https://www.vpnsecure.me/files/canary.txt
- https://www.bolehvpn.net/canary.txt
- https://lokun.is/canary.txt
- https://www.ipredator.se/static/downloads/canary.txt