Simple annoyance or potential security threat? Spoof is defined as “a hoax or swindle.” In the world of electronic networks, a spoofing attack is a situation in which one program successfully masquerades as another by falsifying data and thereby gaining an improper advantage. We have all heard of, and possibly fallen victim to, fraudulent card readers (often inserted on self-service fuel pumps). The fraudulent card readers copy security information from the credit card, which is then used to clone an illegitimate credit card and incur improper charges on the victim’s credit card account.