Comment by tyrel

Seeing a key with substring of "Tyr" as the username and that substring of my key matching scared me a bit.

If you want to check how many bits your key is, use

ssh-keygen -l -f ~/.ssh/your_key.pub

(It wasn't mine, while it is an older key, mine is larger than 768 thankfully)

Edit: look at timdorr's example for a better visual.