Encryption and decryption method based on Bluetooth communication

Abstract

The invention discloses an encryption and decryption method based on Bluetooth communication. The encryption and decryption method comprises the following steps that equipment is connected through a Bluetooth protocol; when data transmission needs to be carried out, the equipment A generates a random number; the equipment A acquires a corresponding encryption key and a data discrete table throughthe random number; symmetric encryption is performed on the plaintext data through the key, and discrete processing is performed to obtain ciphertext data; the equipment A packages the ciphertext dataand the generated random number into a data packet and sends the data packet to the equipment B; the equipment B extracts a random number from the data packet, and obtains a decryption key and a datadiscrete table corresponding to the random number; and data reduction and symmetric decryption are performed on the ciphertext data according to the discrete table to obtain plaintext data. Accordingto the method, hardware design and overhead do not need to be increased, the random number is generated by utilizing the current time, and the mapping relation between the key and the random number and the mapping relation between the data discrete table and the random number can be adjusted, so that encryption time consumption is reduced, and confidentiality and safety of Bluetooth communicationequipment are improved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an encryption and decryption method based on Bluetooth communication. Background technique [0002] As a low-power, low-cost technology, Bluetooth communication has a wide range of applications in the smart phone and smart home appliance industries. Since Bluetooth communication is a wireless communication, the communication data is vulnerable to eavesdropping. If a third party obtains the login information, it can send forged instructions to maliciously take over and control the device, endangering the safety of personnel and equipment. Existing encryption methods usually use a single encryption method And the secret key, which is easy to be cracked and has a low degree of security. Contents of the invention [0003] In order to solve the problems existing in the prior art, the object of the present invention is to provide a Bluetooth communication encryption and decryp...

AI Technical Summary

Problems solved by technology

Since Bluetooth communication is a wireless communication, the communication data is vulnerable to eavesdropping. If a third party obtains the login information, it can send forged instructions to maliciously take over and control the device, endangering the safety of personnel and equipment. Existing encryption methods usually use a single encryption method and the secret key, which are vulnerable to cracking and have a low degree of security

Images