It turns out that emoticons are considered a symbol, so they can beef up your passwords and make them more secure in combination with letters and numbers. Here’s how.
Edit: plus brute forcing is just one scenario. I think the xkcd comic refers to using passwords in online services, and those usually have some sort of rate limiting.
Got a source on that?
Edit: plus brute forcing is just one scenario. I think the xkcd comic refers to using passwords in online services, and those usually have some sort of rate limiting.