IC chip, processing method, IC chip for processing program in the IC chip, and the IC card and the like

摘要

PROBLEM TO BE SOLVED: To provide an IC chip that reduces a processing time by the protective function of data by protecting data by an appropriate protective function, a method of processing in the IC chip, a processing program for the IC chip, and an IC card and the like.SOLUTION: A CPU6 includes the "protective function of a non-update region by a card OS" and the "protective function of an update region by transaction." The "protective function of an update region by transaction" writes all data stored in a page to a backup region with all regions of the page to which an update region prior to update belongs being update regions, in order to notify a card OS that no non-update region exists in the page, not allowing the "protective function of a non-update region by a card OS" to function.