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Fine-grained warrant canaries
We have received no requests about Adam. We have received no requests about Aemo. We have received no requests about Akaam.
A warrant canary is a method for informing one's users that no government subpoenas or gag orders have been received. It relies on the fact that the laws forcing silence about such matters cannot actually compel a person or entity to actively lie. This slight modification of the warrant canary would
make it much more useful.
The site, business, or other entity publishing the canary would simply publish a whole table of canaries, listing each concerned customer or other stakeholder. Upon receiving a request related to John the rest of the table would still be published, but John's name would be removed. Obviously customers may want the canary to use a pseudonym instead of their real names.
||I didn't know there were birds called grained warrant
canaries, or why they should be fined.
||S'pose it's better than being called a lesser spotted grebe or
||"We have received no requests in February 2019 about
Adam's activity in January 2019. We have received no
requests in January 2019 about Adam's activity in January
2019. We have received no requests in January 2019 about
Adam's activity in December 2018. We have received no
requests in January 2019 about Adam's activity in November