Patent ID: 7721116

Claim:
An information processing device comprising: an information processing means provided with a memory region and arranged to allow a player to perform a game by executing a game program installed from a storage medium in response to operations by the player; and an interface to which a removable memory medium, which is provided separately from said memory region and said storage medium, is removably mountable; said information processing means being configured with functions of: (a) storing, on finishing the game, said memory medium mounted to said interface with performance data which is indicative of the latest game status of the game archived by the player on said information processing device and encrypted using identification information inherent to said information processing device as a key; (b) moving said performance data stored at function (a), from the removable memory medium into the memory region and erasing the performance data from the removable memory medium when said removable memory medium is mounted to the interface on resuming the game on the information processing device; (c) decrypting said encrypted data moved from said memory medium using said identifying information as a key; (d) allowing the player to resume the game using the performance data as decrypted at function (c); and (e) updating the performance data stored on the memory region in accordance with progresses of the game, and (f) on finishing the resumed game, encrypting said performance data updated in accordance with progress of the game at function (e) using said identification information inherent to said information processing device as a key; and moving the updated and encrypted performance data to a removable memory medium from said memory region so that the updated performance data is erased from the memory region.