[deno]

Depends on what the password is for. If it can be brute forced offline then you’ll need a lot more than one character to make any difference.

[stretchwithme]

I think you missed my point. If you use a key more than once, heat can't be used to figure out the first time that key was pressed. Only the second press of it can be deduced.

[deno]

Sure but you reduce the search space considerably anyway.