DATA SECURITY ON INFORMATION PROCESSING DEVICE EXECUTING PROCESS DEPENDING ON DATA RECEIVED THROUGH NETWORK

摘要

PURPOSE: A data security on an information processing device performing processes depending on data received through the network is provided to store the received data encrypted with a public key in an HDD(Hard Disk Drive) for a long time by decrypting public key encryption data received from the outside, encrypting the decrypted data again, and storing the encrypted data to the HDD. CONSTITUTION: A data receiver(50) receives a task request from external devices on the network. A task controller(51) controls execution of the task by receiving the task request. A PKI(Public Key Infrastructure) password processor(52) performs encryption/decryption in a PKI password method and assignment/verification of an electronic signature. A PKI key manager(54) manages key information used in the PKI password processor, and reads a private/public key of an image forming device stored in the HDD(16) or a non-volatile memory, and the public key of the external device. An internal key password processor(56) encrypts the data stored to the HDD, decrypts the stored encryption data, and performs encryption/decryption by using an internal key. An internal key manager(58) manages the information of the internal key.