Systems and methods for protecting against password attacks by concealing the use of honeywords in password files

The disclosed computer-implemented method for protecting against password attacks by concealing the use of honeywords in password files may include (i) receiving a login request comprising a candidate password for a user, (ii) authenticating the login request by determining whether a hash of a true password for the user stored in a honeyserver matches a hash of the candidate password, (iii) determining whether the candidate password has matches a hash of a honeyword stored in a password file when the true password hash fails to match the candidate password hash, (iv) classifying the password file as being potentially compromised when the candidate password hash matches the honeyword hash stored in the password file, and (v) performing a security action that protects against a password attack utilizing the potentially compromised password file. Various other methods, systems, and computer-readable media are also disclosed.