Method and device for improving terminalself-flashing safety through ciphertext handshaking

Abstract

The invention discloses a method and device for improving terminal self-flashing safety through ciphertext handshaking. The method includes the steps that A, a terminal is connected with a flashing tool so as to enter a downloading preparation mode, feature information of the terminal and feature information of the flashing tool are respectively encrypted through secret keys randomly generated, and therefore a terminal ciphertext and a tool ciphertext are generated; the terminal and the flashing tool interact, the terminal ciphertext and the tool ciphertext are analyzed, and therefore legality and matching performance of the terminal and the flashing tool are verified; B, after it is verified that the terminal and the flashing tool are legally matched, a downloading channel is started by the terminal and the flashing tool for downloading and flashing. According to the method and device, after it is verified that the terminal and the flashing tool are legal, the terminal and the flashing tool are controlled to start the downloading channel to conduct downloading and flashing; due to the fact that the secret keys used for encryption each time are generated randomly, the deciphering difficulty is greatly increased, and the ciphertexts can be prevented from being deciphered; meanwhile, downloading and flashing can be conducted only after the terminal and the flashing tool are legally matched, so that safety is improved.

Description

Technical field [0001] The present invention relates to the technical field of flashing, and in particular to a method and device for increasing the security of terminal self flashing through ciphertext handshake. Background technique [0002] In order to reduce the inconvenience and repair cost of manual maintenance, many users often choose to self-flash the machine to customize or clean the terminal system. But often because of improper operation, the flashing machine fails or even cannot be turned on. Some online flashing tools (usually flashing applications) often directly enter the download flashing mode when flashing the terminal without any lock protection measures. Although these flashing tools can open the download channel through instructions to block OEM (Original Equipment Manufacturer) Equipment manufacturer) tool, but the instruction is not encrypted, it is easy to be modified and cause user data loss, and the security is not high. [0003] Some anti-flashing soluti...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method and device for increasing the security of the terminal self-refresh machine through ciphertext handshake, so as to solve the problem that the encrypted commands are easy to be cracked when the existing terminal self-refresh machine, resulting in reduced security. The problem

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