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Access restriction device and access restriction method

An access restriction device and access restriction technology, applied in digital transmission systems, instruments, data exchange networks, etc.

Active Publication Date: 2015-10-21
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In this way, in the technique of encrypting a file attached to an e-mail in accordance with a sending destination in the above-mentioned mail server, there is a possibility that a file attached to an e-mail due to an error of the sending source may be read by a sending destination that the sending source does not want to allow viewing. The problem that land can also be viewed
In addition, in the prior art, when an e-mail with an attachment is sent, it is impossible to allow only users who have viewing authority to view the content of the attachment to view it.

Method used

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  • Access restriction device and access restriction method
  • Access restriction device and access restriction method
  • Access restriction device and access restriction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] figure 1 It is a figure which shows the structural example of the mail system of this Embodiment 1.

[0028] exist figure 1 In the mail system shown, the access restriction device 10 is a device for managing e-mails of an organization such as a company, such as a gateway server or a mail server. In Embodiment 1, it is assumed that the access restriction device 10 is a gateway server. A gateway server is a device that performs, for example, archiving of e-mails sent from within the organization, spam filtering of e-mails received from outside the organization, filtering of e-mails sent from within the organization to outside the organization based on the organization's security policy, etc. .

[0029] The sender device 20 is a computer belonging to an organization that manages e-mails by the access restriction device 10 , and is a device used by a user who is the sender of the e-mail according to this embodiment. The sender device 30 is an external computer of an org...

Embodiment approach 2

[0074] Image 6 It is a figure which shows the example of the structure of the mail system concerning this Embodiment 2.

[0075] exist Image 6 In the mail system shown, the access restriction device 100, the source device 120, the destination device 130, the network 140, and the network 150 correspond to the first embodiment. figure 1 The access restriction device 10 , the source device 20 , the destination device 30 , the network 40 , and the network 50 are shown. An example of the hardware configuration of a computer realizing the access restriction device 100 is, for example, figure 2 The configuration of the computer 1 is shown. However, in Embodiment 2, it is assumed that the access restriction device 100 is a mail server having the function of a Web mail server.

[0076] In the mail system introduced with Web mail client (mail user agent) technology, the function of managing e-mail is not specially set up in the computer directly operated by the user, but the func...

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PUM

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Abstract

An access restriction device including a processor; and a memory. The processor executes: receiving an email from a transmission source; specifying including analyzing, when a file is attached to the email, information in the file, and specifying a character string from the file; executing including specifying, from a storing unit in which a character string is associated with an access restriction process, an access restriction process that is associated with the character string specified at the specifying the character string, and executing the specified access restriction process on the file; and sending including attaching, instead of the file attached to the email, the file that has been subjected to the access restriction process at the executing to the email, and sending the email to which the file subjected to the access restriction process is attached to a transmission destination of the email.

Description

technical field [0001] The present invention relates to an access restriction device, an access restriction program, and an access restriction method. Background technique [0002] In recent years, there are many cases where files are sent as attachments to e-mails. At this time, depending on the confidentiality of the attached file, the attached file is encrypted at the sending source. The transmission source transmits the electronic mail with the encrypted file attached to the transmission destination, and also notifies the transmission destination of encryption information. [0003] There are technologies related to the encryption of emails with files attached. For example, when a file is attached to an e-mail sent from a source to a destination, a mail server automatically encrypts the attached file using a policy corresponding to the destination. An encryption key is notified to the sending destination in advance, and the file attached to the electronic mail is decry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/58G06F13/00
CPCH04L51/08H04L51/063H04L51/212
Inventor 村上祐介
Owner FUJITSU LTD