warrant canary

== English == === Etymology === Allusion to a miner's canary. === Noun === warrant canary (plural warrant canaries) (US) A public notice that a service provider has not received a secret government subpoena for their customers' data that they would be prohibited from saying they had received. === References === https://web.archive.org/web/20140707201759/https://www.linx.net/service/publicpeering/nova