Spoofing is the act of changing the source number and Automatic Number Identification (ANI) on an inbound call. This is the same concept as “Caller ID Spoofing,” “Phone Number Spoofing,” and similar names. Spoofing makes all inbound voice call-based attacks more difficult to deal with including robocalls, scams, vishing, Telephony Denial of Service (TDoS), and social engineering, including Account Takeover (ATO) in financial contact centers. For all of theses reasons, we can no longer trust the calling number and caller ID.

In this white paper we explore the spoofing threat and discuss how call authentication solutions can defeat spoofing and mitigate related threats and attacks.