Public statement confirming no secret government orders have been received, removed as implicit warning
A warrant canary is a method used by technology companies and service providers to indirectly inform users that they have received a secret government order — such as a National Security Letter (NSL) or FISA Court order — without violating the gag order that typically accompanies such demands. The mechanism works through absence: a company publishes a regular statement confirming that it has not received any secret orders. If the statement is removed or not renewed, users can infer that such an order has been received.
The concept draws its name from the canaries historically used in coal mines to detect toxic gases — the bird's death served as a warning to miners. Similarly, the "death" of a warrant canary signals danger to users.
Apple pioneered the high-profile use of warrant canaries in its transparency reports. When Apple's 2014 transparency report removed a statement that had previously appeared — "Apple has never received an order under Section 215 of the USA PATRIOT Act" — observers inferred that the company had received such an order. Reddit similarly removed its warrant canary in 2016, with co-founder Steve Huffman confirming the removal was intentional but declining to elaborate due to legal restrictions.
