Data transmission method and device based on asymmetric encryption, equipment and medium

The invention discloses a data transmission method based on asymmetric encryption. Comprising the following steps: acquiring a public key sent by a receiving end, and calculating an encryption bit of to-be-transmitted data according to the public key; wherein the data to be transmitted comprises an encryption bit and a non-encryption bit; calculating a first check number based on the to-be-transmitted data; encrypting the encryption bit and the first check number by using the public key to generate encrypted data; writing the encrypted data into a first picture to obtain a second picture; wherein the first picture is a randomly generated picture; and transmitting the second picture and the non-encrypted bit to a receiving end. The encryption and decryption efficiency is higher, a large amount of information can be safely and reliably sent within a short time, potential security threats and attacks can be effectively dealt with, and the encryption and decryption efficiency and security are improved. 本发明公开了一种基于