The honeypot principle is getting the application level. The basic idea is that someone who read an "honeytoken" information that should never been read (because fake & useless) is detected as a hacker...

Honeytokens are pieces of seemingly enticing information that have no useful value. Embedded in ways so that no innocent person should accidentally stumble upon them, honeytokens trigger alarms when viewed, grabbed or downloaded. For example, a bank could insert a fake credit card number into its files and then set up a program called a "sniffer" on the network that would send out an alarm if anyone touched that particular number.
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