The ICreditCardEncryption2 interface allows the payment instruction (PI) to be use security protocols that the client can install in the Microsoft® Wallet. This interface consists of the following functions:
The encryption protocol used to create the payment instruction is selected based upon the AcceptedTypes payment property specified by the merchant. The AcceptedTypes payment property defines which payment types a merchant accepts in an electronic transaction. A protocol is responsible for the creation of the PI. The PI is posted back to the server as if the information were entered in an HTML form. The PI may contain one or more fields. The information is returned as a two-dimensional SAFEARRAY of name/value pairs. All PIs should contain a "TYPE" field along with all additional fields.