KRISNA: Cryptoprocessor architecture for national smart card

Smart card technology has already widely used in Indonesia. Security threat on smart card is growing rapidly, therefore more security is needed. Ironically, Indonesia as one of the smart card most users very dependent on foreign technology and haven't built its own smart card architecture. This paper presents KRISNA, a cryptoprocessor architecture for national smart card. KRISNA has an ability to maintain the runtime of the smart card operation system by using 8051 architectural system as the main control. KRISNA uses a selection of lightweight implementation of cryptograpyc algorithm that can be implemented in smart card environment system. KRISNA has BC3 64-bit as symmetric cryptography, ECC 233-bit as asymmetric cryptography, WELL 2 ⁵¹² as pseudo random number generator and also SHA256 as hash function. KRISNA also accelerates the communication between the main controller and the coprocessor by implementing instruction buffer and shared memory controller.