CN212624019U

CN212624019U - Printer with credible judgment function

Info

Publication number: CN212624019U
Application number: CN202021179940.9U
Authority: CN
Inventors: 孙芳; 张俊辉; 高阳
Original assignee: Tianjin Optical Electrical Communication Technology Co Ltd
Current assignee: Tianjin Optical Electrical Communication Technology Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-02-26
Anticipated expiration: 2030-06-23

Abstract

A printer having a trusted judgment, the printer comprising: the data transmission interface is used for connecting data end equipment; the data transmission interface is connected with the data terminal equipment; a memory for storing data; the credible root chip is used for judging the credibility of the printer; the main controller is used for processing the instructions sent by all the parts; the main controller is respectively connected with the data transmission interface, the memory and the trusted root chip. According to the printer with credibility judgment, credibility judgment is carried out on the printer by using the domestic main control chip, the domestic credibility root chip and the domestic encryption algorithm, national production credibility calculation is achieved, and information safety of the printer in China is greatly improved.

Description

Printer with credible judgment function

Technical Field

The utility model belongs to the technical field of the printer, concretely relates to printer with credible judgement.

Background

At present, a foreign main control chip, a non-trusted root chip or an encryption program using a public encryption algorithm (such as SHA256) are often used for credibility judgment of the printer, but the methods have weak autonomous controllability and weak security, and are not beneficial to information security of the printer in China.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a printer with credible judgement, include:

the data transmission interface is used for connecting data end equipment; the data transmission interface is connected with the data terminal equipment;

a memory for storing data;

the credible root chip is used for judging the credibility of the printer;

the main controller is used for processing the instructions sent by all the parts; the main controller is respectively connected with the data transmission interface, the memory and the trusted root chip.

Preferably, the method further comprises the following steps: the data exchange interface is used for exchanging data between the data side equipment and the main controller; the data exchange interface is connected with the master controller.

Preferably, the memory comprises: a kernel storage section for storing a kernel.

Preferably, the memory further comprises: a file system storage section for storing a file system.

Preferably, the memory further comprises: a trusted metrics program storage for storing a trusted metrics program.

Preferably, the file system storage includes a non-modifiable file storage for storing a non-modifiable file.

Preferably, the file system storage section includes a modifiable file storage section for storing a modifiable file.

According to the printer with credibility judgment, credibility judgment is carried out on the printer by using the domestic main control chip, the domestic credibility root chip and the domestic encryption algorithm, national production credibility calculation is achieved, and information safety of the printer in China is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic diagram of a printer with trusted judgment according to the present invention;

FIG. 2 is a schematic diagram of the connection of a memory in a printer with a trusted judgment according to the present invention;

fig. 3 is a schematic diagram of a connection of a file system storage unit in a printer with a trusted judgment according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In an embodiment of the present application, as shown in fig. 1, the present application provides a printer with trusted judgment, including:

the data transmission interface 10 is used for connecting data end equipment; the data transmission interface 10 is connected with the data terminal equipment;

a memory 30 for storing data;

a root-of-trust chip 20 for determining the trustworthiness of the printer;

the main controller 40 is used for processing the instructions sent by all the parts; the master controller 40 is connected to the data transmission interface 10, the memory 30 and the root of trust chip 20 respectively.

In this embodiment, the data transmission interface 10 includes an ethernet port, the trusted root chip 20 is a domestic TCM trusted root chip, the model is Z32H330TC, a GM3 algorithm is built in the TCM trusted root chip, and the master controller 40 is a domestic master control chip LOONGSON, the model is LOONGSON _1C 300.

When the printer is started each time, the GM3 algorithm inside the root-of-trust chip 20 is used to measure the program (binary data) transmitted from the main controller 40, and the measurement result is compared with the reference value set in the main controller 40, if the measurement result is consistent with the reference value, the main control program of the main controller 40 is considered to be trusted, and the main controller 40 can continue to be started, otherwise, the main controller 40 is controlled to prohibit the loading of subsequent programs.

As shown in fig. 1, in an embodiment of the present application, a printer with trusted judgment further includes: a data exchange interface 50 for the data side device to exchange data with the master 40; the data exchange interface 50 is connected to the master 40. The data exchange interface 50 includes a USB interface.

As shown in fig. 2, in the embodiment of the present application, the memory 30 includes: the device comprises a kernel storage part 31, a file system storage part 32 and a credibility measurement program storage part 33, wherein the kernel storage part 31 is used for storing kernels, the file system storage part 32 is used for storing file systems, and the credibility measurement program storage part 33 is used for storing credibility measurement programs.

As shown in fig. 3, in the embodiment of the present application, the file system storage section 32 includes a non-modifiable file storage section 34 and a modifiable file storage section 35, the non-modifiable file storage section 34 is used for storing a non-modifiable file, and the modifiable file storage section 35 is used for storing a modifiable file.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A printer having a trusted judgment, comprising:

a memory for storing data;

the credible root chip is used for judging the credibility of the printer;

2. The printer with trusted judgment as claimed in claim 1, further comprising: the data exchange interface is used for exchanging data between the data side equipment and the main controller; the data exchange interface is connected with the master controller.