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Encryption device

An encryption device and encrypted technology, applied in the direction of digital transmission system, electrical components, transmission system, etc., can solve the problem of large encryption processing load

Inactive Publication Date: 2006-03-15
MURATA MASCH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage is that the encryption processing load in embedded devices is very large

Method used

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  • Encryption device
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Examples

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Embodiment Construction

[0022] Referring to the drawings, an encryption device according to an embodiment of the present invention will be described. FIG. 1 shows an example of a network structure, in which an encryption device 1 according to an embodiment of the present invention is connected to a local area network (Local Area Network, LAN) 5 . As shown in FIG. 1, an encryption device 1, Internet facsimile machines 2 and 2', a mail server 3, a personal computer 4, and the like are connected to a LAN 5.

[0023] When the Internet facsimile machine 2 transmits electronic mail (a) addressed to a destination (not shown) to the encryption device 1, the encryption device 1 extracts destination address information of the transmission destination of the received electronic mail. Then, the encryption device 1 searches whether the destination address supports encryption according to the telephone directory database. If the destination address supports encryption, the encryption device 1 uses the registered ...

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Abstract

An encryption device which enables a client not having an encryption function to easily use a function of encrypted mail without carrying out a management of certification and a key and an encryption and a decryption. When an Internet facsimile machine transmits electronic mail to an encryption device, the encryption device converts the received electronic mail into encrypted mail and transmits to a mail server. When another Internet facsimile machine transmits data including a part to be encrypted and transmission destination information as a main body of mail to an encryption and decryption I / F of the encryption device, the encryption device encrypts the main body of the received mail under a prescribed encryption method and sends back to the other Internet facsimile machine. Accordingly, the other Internet facsimile machine can format encrypted data into encrypted mail and transmit to a remote Internet facsimile machine.

Description

technical field [0001] The present invention relates to an encryption device, and more particularly to an encryption device which uses a public key encryption method to encrypt electronic mail or data and perform electronic signatures. Background technique [0002] Recently, computer communication networks such as the Internet for sending electronic mail have become common. A facsimile protocol using a conventional public network is different from a communication protocol for computer communication using the above-mentioned computer communication network. Therefore, communication from the facsimile machine to the computer communication network cannot be performed directly. [0003] However, even image data of an original document or the like that is usually sent and received using facsimile communication, by converting the image data into an electronic mail format, the image data can be sent and received via a computer communication network. An Internet facsimile machine w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L12/58H04L29/06
CPCH04L63/123H04L51/28H04N1/00212H04N1/00209H04L63/0428H04L51/48H04L51/00
Inventor 谷本好史宗宫和男竹内茂树
Owner MURATA MASCH LTD
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