When a customer owns multiple credit cards, the selection of a credit card for a purchase payment is rarely done systematically. Furthermore, the customer has no online options to pay a high cost item with multiple cards. This paper presents a flexible Payment Recommender (PR) system that helps the customer to make a decision on identifying a group of credit cards, called Virtual Card, which pr...

The potential space of game designs is astronomically large. This paper shows how design theories can be translated into a simple, tangible card deck that assist in the exploration new within broader "design space." By translating elements theory physical deck, we enable users to randomly sample order synthesize variations for play platform ("Lumies"). In series iterative and testing rounds wit...

Secure multiparty computation can be done with a deck of playing cards. For example, den Boer (EUROCRYPT ’89) devised his famous “five-card trick”, which is a secure two-party AND protocol using five cards. However, the output of the protocol is revealed in the process and it is therefore not suitable for general circuits with hidden intermediate results. To overcome this limitation, protocols ...