Why Credit card CVC number is visible and in contrast Debit card Pin number is secret?

Why the hell credit card 3 digit number is Open (visible) to all and the Debit Card 4 digit pin number is Secret (in-vissible)? what's the basic reason behind this difference? Is it not possible that I have a Credit card which has 3 digit CVC as secret as Debit card one? so that I have better control on the transactions from fraud?|||that's a very good question. The CVC is to prevent people from just stealing your credit card number only and trying to use it for transactions where they don't have the physical card present. It may be a good idea to make the CVC secret, but that would be another number you'd have to remember. It's just to prevent someone from using only your credit card number when they lack the actual credit card.|||for one thing, a pin number and cvc are two different things... both credit cards and debit cards have both pin numbers and cvc. the whole point of a cvc/cvv is to determine if the cardholder is actually holding the card when making phone or internet purchases. it's a further attempt to reduce fraud.