Patent ID: 8301908
Filing Date: 2012-10-30
Classification: G06F,H04L

Abstract:
1. An information processing device comprising: at least one processor; and at least one memory, the memory storing instructions which when executed cause the at least one processor to implement, an input interface that receives input of encrypted data; a decryption software module that decrypts encrypted data inputted by the input interface using a decryption key forming a pair with a first encryption key used to encrypt the data; a key generator that generates a second encryption key different from the first encryption key when power to the information processing device is turned on; an encryption software module that encrypts data decrypted by the decryption module using the second encryption key; a storage device that stores data encrypted by the encryption module; and a controller that receives input of a retention time for data inputted by the input module, and instructs the encryption module to execute the encryption when the received retention time is longer than a preset threshold value, wherein the second encryption key generated by the key generator is deleted when the power to the information processing device is turned off.