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If you display 4 digits to the user for CC validation, as basically everyone does, then there will always be someone who can read those 4 digits and give them t
by Uchikoma 13y ago
If you display 4 digits to the user for CC validation, as basically everyone does, then there will always be someone who can read those 4 digits and give them to someone else.
- rahimnathwani 13y agoYou don't need to display them to the user. The user can ask for them from the customer. The user types in the 4 digits the customer provides. The computer compares the two strings. The user need never see the real stored digits.
- Uchikoma 13y agoSorry, in my argument I meant user with what you've called customer.