Even if the different fields have different security requirements, that doesn't seem to be a good reason to require them to be entered separately. I don't real

Even if the different fields have different security requirements, that doesn't seem to be a good reason to require them to be entered separately. I don't really care if someone mandates that digits 1-4 can be sent via email, digits 5-10 can be stored unencrypted, digits 11-16 must be encrypted, and digits 17-20 can never be stored at all. They're still just digits/bits of information, and I have to provide all of them almost all the time anyway. The one exception is when a retailer has saved my credit card number, in which case they might ask me for the CVV only. But I'd rather that they didn't save the card number at all! I have to look up the CVV and copy and paste it into their form every time anyway--so they may as well require the whole thing every time.