Combining encryption methods in multipurpose smart card

Smart cards have many applications such as health, ID verification and access control, electronic purse card, banking card, payphone card, passport card and license card. Since, there are many kinds of smart cards, it is difficult to carry and protect them. Losing one card means losing a lot of important information. So in this paper proposes to combine some important cards such as: health, passport and credit system in one multipurpose smart card and find an encryption method to make it enough secure. It should also be efficient in transferring information. It means, we develop an effective encryption system for these three applications in a multipurpose smart card and we propose an optimized encryption system for the applications.