Safety communication method suitable for remote control with limited capability at controlled end

Abstract

The invention discloses a safety communication method suitable for remote control with a limited capability at a controlled end. The method comprises the following steps of: setting password sets at a control end and the controlled end and generating a password set according to an input initialization password by an irreversible method, wherein the password set comprises an index number and the password per se and encryption and decryption are performed by using the password corresponding to the recorded index number in a normal communication process; when the password is asynchronous, transmitting the index number by encrypting to perform password synchronization; and when a password set updating condition is met, negotiating about the update of the password set by transmitting a selected index number. A password set generating device for calculating the password set and communicating with the controlled end only when the password set is needed to be generated is arranged at the controlled end. Various attacks are resisted effectively by using a dynamic password and operation of real-time password calculation needed by the transmission of each data packet is avoided. Simultaneously, the password per se does not need to be transmitted on a communication link in password synchronizing and password set updating processes, so that simpleness and safety are realized.

Description

technical field [0001] The invention relates to a safe communication method, in particular to a remote-controlled safe communication method with limited capability of a controlled terminal. Background technique [0002] At present, with the continuous development of the Internet of Things and remote control, systems such as remote control of smart homes are more and more valued and applied to the real world, and the security of its communication content is also becoming more and more important. Smart home remote control generally adopts a remote-controlled device, which needs to be on standby at all times to receive remote control commands, so it requires low energy consumption, so its functions must be simple enough to avoid a large number of calculations, only need to have communication, simple Encryption and decryption functions, and has a certain storage space. [0003] At present, the methods for ensuring communication security mainly include: authentication-based meth...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, to provide a secure communication method suitable for remote control with limited capabilities of the controlled terminal, to introduce index numbers through ciphers, to use OTP to resist interception and replay attacks and to calculate the amount of symmetric encryption technology It has the advantages of small size, fast encryption speed and high encryption efficiency, and solves the problem of dynamic password synchronization and password set update in this case, avoiding the simple use of symmetric encryption technology for passwords that are easy to be cracked and OTP to calculate passwords every time Difficult to sync with passwords

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