Data security in an information processing device
AssigneeFuji Xerox Co., Ltd.
InventorsTakanori Masui, Tatsuhiko Yokohama, Masanori Satake
Life of this patent
Estimating the term…
Abstract
A device and method for data protection of inputted and stored publicly encrypted data. Publicly encrypted data can be received by a data receiver module and stored in a storage module and be decrypted by a decryption module using a first encryption key. A deciding device can determine whether or not the data needs protection. If necessary, the data can be re-encrypted by an encryption module based on a second and different internal private encryption key generated from the encryption module and stored in the storage module.
Claims3
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.
A non-transitory computer-readable medium storing a program that, when executed, causes a computer to function as:
- an input interface that receives input of encrypted data;
- a decryption module that decrypts 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 computer is turned on;
- an encryption 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 interface, 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 computer is turned off.
Dependencies are inferred from the claim text.