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Cable modem and digital certificate updating method thereof

A digital certificate update, modem technology, applied in telephone communication, electrical components, user identity/authority verification, etc., can solve problems such as network congestion and paralysis, and achieve the effect of ensuring normal use

Inactive Publication Date: 2010-06-09
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hackers may also listen, steal, and maliciously tamper with information on public lines. In severe cases, the entire network may be blocked or even paralyzed

Method used

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  • Cable modem and digital certificate updating method thereof
  • Cable modem and digital certificate updating method thereof
  • Cable modem and digital certificate updating method thereof

Examples

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Embodiment Construction

[0014] refer to figure 1 Shown is a schematic diagram of the operating environment of the preferred embodiment of the cable modem of the present invention. The cable modem (Cable Modem, CM) 2 runs in the digital certificate renewal system 5, and the digital certificate renewal system 5 also includes: the cable modem front-end system (Cable Modem Terminal System, CMTS) 1, the customer end front-end equipment (CustomPremise Equipment, CPE ) 3 and a certificate authority (Certificate Authority, CA) 4. The cable modem 2 is connected to the front-end equipment 3 at the user end through an Ethernet interface or a USB interface. The cable modem 2 receives the data packet from the front-end equipment 3 at the user end, modulates it into a radio frequency signal and forms uplink data to the cable modem front-end system 1, and modulates the downlink radio frequency signal into a digital signal and outputs it to the front-end user end equipment3. The cable modem front-end system 1 is ...

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PUM

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Abstract

The invention relates to cable modem and digital certificate updating method thereof. The cable modem comprises a judging module, a request module, an analysis module and a writing-in module, wherein the judging module is used for judging whether a digital certificate needs to be updated or not according to an existing digital certificate of the cable modem; the request module is used for sending updating request data packet to an certificate authority; the analysis module is used for monitoring and analyzing the received data packet so as to acquire an updating request response data packet from the certificate authority; and the writing-in module is used for writing a digital certificate reissued in the updating request response data packet into a memory of the cable modem and replacing the existing digital certificate. The invention can safely update the digital certificate and ensure that the cable modem is normally used in the expected duration.

Description

technical field [0001] The invention relates to an electronic device and its safety management and control method, in particular to a cable modem and its digital certificate updating method. Background technique [0002] With the development of communication and information technology, the three traditional information networks (telecom network, computer network, and cable TV network) are infiltrating and merging with each other. Hybrid fiber / coax (HFC) uses the existing cable TV network to become a broadband integrated information network compatible with telephone, cable TV and computer networking functions with its advanced optical fiber transmission technology and bandwidth advantages. [0003] However, because the HFC network itself adopts a shared channel topology, users can receive all data transmitted on the network, so there are great security risks. Users may fake or pretend to be other network terminals to send applications to the server to obtain unauthorized ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L29/06H04M11/06
CPCH04L63/0823H04L12/2801H04L63/062
Inventor 罗佑铭
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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