On a web store I have a purchase form that only asks for email, credit card #, expiration date & CCV (security). This is the minimum requirement to make a transaction.
However, my instinct is that asking for such little amount of information deters users because it seems less secure or less legitimate in some way.
Furthermore, it seems that checkout is an opportunity to find out more information about the user (like name and address).
Is there a sweet spot of information to ask at checkout that makes the transaction seem secure but is not asking so much that it deters users?
This is my first question on this forum. Any help is greatly appreciated. Thanks in advance!