Cable modem (CM) and certificate test method thereof

Abstract

A cable modem stores certificates including a root certificate authority (CA) certificate, a root CA public key, a manufacturer CA certificate, and a cable modem certificate. The cable modem reads the root CA public key, determines whether the root CA public key complies with a key industry standard, determines whether the manufacturer CA certificate is generated according to the root CA certificate, and determines whether the cable modem certificate is generated according to the manufacturer CA certificate.

Description

technical field [0001] The invention relates to a communication device and a testing method thereof, in particular to a cable modem and a certificate testing method thereof. Background technique [0002] In the past, when the factory produced cable modems (Cable Modem, CM), it was possible to store important information such as incorrect digital certificates (certificate) and media access control addresses (Media Access Control Address, MAC Address). The products flow into the client, and when the client discovers that the setting of these important information is wrong, the problem can only be solved through the Return Material Authorization (RMA) process, and the cost of the RMA process is very high. [0003] Moreover, there has not been a quick check mechanism in the prior art to check important information such as certificates and MAC addresses stored in the cable modem. If you want to check the digital certificate of the cable modem, you must use additional equipment. ...

AI Technical Summary

Problems solved by technology

[0002] In the past, when the factory produced cable modems (Cable Modem, CM), it was possible to store important information such as incorrect digital certificates (certificate) and media access control addresses (Media Access Control Address, MAC Address). The products flow into the client, and when the client discovers that the settings of these important information are wrong, the problem can only be solved through the Return Material Authorization (RMA) process, and the cost of the RMA process is very high

[0003] Moreover, there has not been a quick check mechanism in the prior art to check important information such as certificates and MAC addresses stored in the cable modem. If you want to check the digital certificate of the cable modem, you must use additional equipment. For example, the cable modem head-end system (Cable Modem Termination Systems, CMTS), a specific server (Provisioning Server), etc. can perform the inspection action. Therefore, the factory checks the important information stored in the cable modem during the production process. Existence test The problem of inefficiency

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