Encoding messages in kerning.
I was just reading about this! Apparently it's called a "Canary trap:" https://en.m.wikipedia.org/wiki/Canary_trap …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I was just reading about this! Apparently it's called a "Canary trap:" https://en.m.wikipedia.org/wiki/Canary_trap …