Encryption method of rotary display LED screen

Abstract

The invention relates to the technical field of encryption of embedded products. The invention discloses an encryption method of a rotary display LED screen. Encryption is divided into two parts, respectively McuA and McuB factory signature authentication and McuA and MucB working state authentication. The whole process of McuA and McuB factory signature authentication needs to be completed withinagreed time, and if McuB accumulatively obtains requests for more than three times, violent cracking is regarded as violent cracking, and self-destruction processing is carried out. According to theencryption method of a rotary display LED screen, communication between the McuA main control chip and the McuB main control chip is fully adopted, mutual authentication is carried out, so that the safety of software is effectively ensured, and the PCB space is saved. Secondly, all processes and algorithms of the method are designed by a person, the cost of an encryption chip is saved, backdoors of a third party are effectively prevented, meanwhile, only internal authentication of a machine is needed, networking activation is not needed, and the safety under the condition of no network can beensured.

Description

technical field [0001] The invention relates to the technical field of encryption of embedded products, in particular to an encryption method for a rotating display LED screen. Background technique [0002] At present, this field mainly achieves software protection by using encryption chips to realize the protection of embedded hardware and software or by using network authentication to activate software for software. The defects of using encryption chips to realize the protection of embedded hardware and software are: 1. The embedded encryption chip needs to occupy a certain amount of PCB board space, which is inflexible. It is a great challenge for the scene with a very compact layout, and it may even be completely inapplicable, increasing the cost, and it is difficult to guarantee brute force cracking. 2. In addition to the cost of the encryption chip itself, the use of the encryption chip also requires the support of a third-party encryption chip company. It is difficult...

AI Technical Summary

Problems solved by technology

[0002]At present, this field mainly uses encryption chips to realize the protection of embedded hardware and software, or uses network authentication to activate software to achieve software protection. The defects of embedded hardware and software protection are: 1. The use of embedded encryption chip needs to occupy a certain amount of PCB board space, which is not flexible. fee, hard to guarantee brute force cracking

2. In addition to the cost of the encryption chip itself, the use of the encryption chip also requires the support of a third-party encryption chip company. This process is difficult to ensure that the third party can not leave a back door

The disadvantages of using network authentication to activate software to achieve software protection are: using network authentication to activate requires devices to add networking functions, many embedded products do not need networking functions, and the cost of separately developing networking functions for authentication is relatively high.

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