File management apparatus for IC card

A file management apparatus comprising:

• a memory having a plurality of files for storing data, each of the files including a plurality of areas;
• first storage means for storing a plurality of file directories, each of the file directories including at least one of said files and having corresponding file position data, first lock data denoting a first locking condition of an accessing operation for each of the files, and second lock data denoting a second locking condition of an accessing operation for each of the plurality of areas within each file;
• second storage means for storing a plurality of area definition data, each of the area definition data having corresponding area position data, and key data denoting an access condition for an area identified by the area definition data and area position data corresponding thereto;
• first determination means for determining whether the accessing operation for a file to be accessed is inhibited by referring no the first lock data stored in the first storage means;
• first accessing means for accessing the file to be accessed when it is determined by the first determination means that the accessing operation for the file to be accessed to is not inhibited;
• second determination means for determining whether the accessing operation for areas to be accessed is inhibited by referring to the second lock data included in a file directory corresponding to a file to which the areas to be accessed depend on;
• third determination means for determining whether the accessing operation for the area to be accessed is inhibited by referring to the key data included in an area definition data;
• and
• second accessing means for accessing to the area to be accessed when it is determined by the second and third determination means that the accessing operation for the area to be accessed is not inhibited.