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That is called a canary trap. https://en.wikipedia.org/wiki/Canary_trap https://en.wikipedia.org/wiki/Canary_trap
by MikeDelta 5y ago
That is called a canary trap.
https://en.wikipedia.org/wiki/Canary_trap https://en.wikipedia.org/wiki/Canary_trap
- perl4ever 5y agoRegarding the related technique, a "barium meal test", there is an xkcd: https://xkcd.com/525/ https://xkcd.com/525/