Patent ID: 9672390
Date: 2017-06-06
CPC Classifications: G06F,G06K

Claim:
1. An IC Card, comprising: a communication unit configured to perform data communication with an external device; a data memory configured to store data in units of data as a target to access, according to a command from an external apparatus; a working memory configured to store use statuses, on a plurality of logical channels, of each piece of data stored in the data memory; and a controller configured to wherein the controller performs access to the first data on a second logical channel and stores, in the working memory, the first use status indicating that the first data is used on the second logical channel, then performs access to the second data on the second logical channel and stores, in the working memory, the second use status indicating that the second data is used on the second logical channel, and updates the first use status to a third use status indicating that the first data is unused, the first information includes information added to the response message of the command, the information added to the response message indicating that the first data or the second data specified by the command has been made inaccessible because the first data or the second data has been used on another logical channel, if the first data or the second data specified by the command has been made inaccessible because the first data or the second data specified by the command has been used on a channel other than the first logical channel specified by the command.