Data processing device, encryption communication method, key generation method, and computer program

a data processing device and encryption communication technology, applied in the field of data processing devices, encryption communication methods, key generation methods, computer programs, can solve the problems that the encryption communication for installing the private key/public key pair and the certificate thereof might not be executed

Active Publication Date: 2021-01-05
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables secure encryption communication without generating key pairs, preventing key leakage and ensuring secure installation of key pairs, even in environments with low security standards, by using default or self-generated keys stored in the device.

Problems solved by technology

However, there is a possibility that the data processing device in a factory shipment status does not have own public key / private key pair.
In such a case, the cryptographic communication for installing the private key / public key pair and the certificate thereof might not be able to be executed.

Method used

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  • Data processing device, encryption communication method, key generation method, and computer program
  • Data processing device, encryption communication method, key generation method, and computer program
  • Data processing device, encryption communication method, key generation method, and computer program

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

(Network Print System )

[0034]As substantially explained in the following, the present invention is premised on a network print system in which a terminal and an image forming device are connected on a network. In this system, the embodiment of the present invention enables to achieve both a method of easily installing a public key / private key pair and a public key certificate from the terminal to the image forming device for a user who does not demand high-level security and a method of safely installing the key pair and the certificate through the network without any leakage and alteration (or interpolation).

[0035]FIG. 1 is a diagram showing the configuration by which the print system according to the first embodiment of the present invention can operate.

[0036]In FIG. 1, each of numerals 110 and 111 denotes a terminal (that is, a PC (personal computer)), each of numerals 120 and 121 denotes a multifunctional image forming device (hereinafter called an MFP (multifunctional periphera...

second embodiment

(Network Print System )

[0084]Subsequently, the network print system according to the second embodiment of the present invention will be explained with reference to the attached drawings.

[0085]FIG. 11 is a diagram showing one example of the configuration of the network print system according to the second embodiment.

[0086]A print device 1110 according to the present embodiment is connected to an external controller terminal device 1120 of the print device 1110 and a user terminal device 1130 through a network 1100, whereby the print device 1110 can mutually execute data communication with the external controller terminal device 1120 and the user terminal device 1130. Here, it should be noted that FIG. 11 shows the single print device, the single external controller terminal device and the single user terminal device. However, it is possible to provide the plural print devices, the plural external controller terminal devices and the plural user terminal devices.

[0087]The print device ...

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Abstract

A data processing device comprises a storage unit adapted to store an initial value of a pair of a public key and a private key and a communication unit adapted to execute communication with an external device with use of the initial value of the pair of the public key and the private key stored in the storage unit, thereby enabling encryption communication without generating the pair of the public key and the private key.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a reissue of U.S. Pat. No. 8,015,393, issued on Sep. 6, 2011, which is hereby incorporated by reference, as if fully set forth herein. U.S. Pat. No. 8,015,393 matured from U.S. patent application Ser. No. 11 / 101,493, filed on Apr. 8, 2005, which claims the benefit of Japanese Patent Application No. 2004-117117, filed on Apr. 12, 2004, and Japanese Patent Application No. 2004-191542, filed on Jun. 29, 2004. Those applications are also incorporated by reference herein in their entireties.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to technique concerning a data processing device, an encryption communication method, a key generation method and computer program for executing these methods.[0004]2. Related Background Art[0005]Recently, a network security function has come to be requested to a data processing device. To comply with such a request, for example, the data proces...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): G06F9/00H04L9/08H04L9/32H04L9/00H04L9/30
CPCH04L9/0891H04L9/3263
InventorFUKASAWA, NOBUAKI
OwnerCANON KK