Your credit card has a 16-digit number on the front, plus an expiration date, and another three-digit code on the back. We all know in a vague way that the code on the back (also known as the “CVC” or “CVV”) has something to do with making transactions safer or reducing fraud, but other than that we don’t give it much thought — and while we might expect to have to share that number when shopping online, we certainly don’t expect to be asked to read it out loud when making an in-person purchase at a crowded coffee shop. [More]
