Hiding secrets in online text with zero-width characters

Unicode includes six "zero-width characters" that are not visibly rendered in browsers (U+FEFF, U+200C, U+200D, U+200E, U+2060, U+180E) -- they're used for some specialized cases in rendering non-Roman alphabets.

Inzerosight's browser extension allows you to insert and detect hidden messages encoded in zero-width characters; absent the plugin or a source-code inspection, these do not show up at all, not even when the text is highlighted.

‌‎­‍­­‍⁠⁠‌᠎­​‌​​⁠‍‍​​᠎​⁠‌‌᠎‍⁠⁠‌᠎⁠⁠​‍‌‌‌‌⁠⁠‌​‌⁠​‌⁠᠎­​​‍‍​​⁠‌­​‍​‌​​᠎‍⁠​​­

I may or may not have included some of this text in this post.

inØsight [Planetrenox]

(via Hackaday)