US Patent 9571497 Systems and methods for blocking push authentication spam

The disclosed computer-implemented method for blocking push authentication spam may include (1) detecting an attempt by an unauthenticated source to gain access to a web resource protected by an MFA service, (2) issuing, to a mobile device of an authenticated user of the MFA service, a push authentication request to query the authenticated user about whether to allow the unauthenticated source's attempt, (3) determining, based at least in part on the push authentication request issued to the mobile device, that the authenticated user has not allowed the unauthenticated source's attempt, and (4) in response to determining that the authenticated user has not allowed the unauthenticated source's attempt, blacklisting the unauthenticated source such that the MFA service refuses to issue any subsequent push authentication requests in connection with the unauthenticated source. Various other methods, systems, and computer-readable media are also disclosed.