A Persistent Memory Management in Java Card

EEPROM as persistent memory in smart card has some different features with other memories. It consists of the pages with a fixed size and has the characteristics due to them. It is more efficient to consider them and to handle EEPROM by page than to think of it as a seamless space and to deal with it as one large chunk. Because smart card is categorized as the device closely interactive with users, the faster response time is important. Accordingly, the time spent in managing the card memory should be in the acceptable range. The necessity to manage the card memory, EEPROM, to be reused efficiently, arises from its small capacity due to the physical size of smart card itself. In this point, the memory management schemes such as memory allocation, withdrawal and garbage collection get to have importance concretely. In this paper, we propose an efficient persistent memory management scheme in smart card based on the model of our Next Generation Integration Circuit(NGIC) Card. Key-Words: Memory Management in Java Card, EEPROM, Page handing, Page Manager, NGIC Card