Secure data transmission method and system for satellite short message communication

Abstract

One or more embodiments of the present specification provide a secure data transmission method and system for satellite short message communication. The method comprises the following steps of: enabling sending equipment to call a software development kit for producing a session key; symmetrically encrypting plaintext data into ciphertext data by using the produced session key; asymmetrically encrypting the session key by using the identification public key to form a key ciphertext form; packaging the ciphertext data and the key ciphertext together, and sending the ciphertext data and the key ciphertext to a receiving device through a satellite communication system in the form of a short message; and finally, after receiving the key ciphertext, enabling the receiving device to decrypt the key ciphertext by using the identification private key to obtain a session key in the key ciphertext, and decrypting the ciphertext data by using the session key to obtain final plaintext data. According to the scheme, based on the characteristics of a symmetric encryption mechanism and an identification key encryption mechanism, a digital certificate is abandoned, the space required for transmission is greatly reduced, and the characteristics of satellite short message communication are adapted to a great extent.

Description

technical field [0001] One or more embodiments of this specification relate to the technical field of information security, and in particular to a method and system for secure data transmission for satellite short message communication. Background technique [0002] In the data transmission of my country's independent Beidou satellite communication system, there are two major problems. First, the data transmission of the Beidou communication network adopts the form of short messages, but the capacity of short messages is at most 78 bytes, which means that the data transmission There is a huge limit on the size, but in reality, the encrypted data of the traditional certificate-based public key encryption system, that is, the PKI CA system, is often large, and it is extremely difficult to adapt to the data capacity limit of the Beidou satellite short message, so a lot of data Symmetric encryption is used between the sending device and the server, that is, the same key is used to...

AI Technical Summary

Problems solved by technology

[0002] In the data transmission of my country's independent Beidou satellite communication system, there are two major problems. First, the data transmission of the Beidou communication network adopts the form of short messages, but the capacity of short messages is at most 78 bytes, which means that the data transmission There is a huge limit on the size, but in reality, the encrypted data of the traditional certificate-based public key encryption system, that is, the PKI CA system, is often large, and it is extremely difficult to adapt to the data capacity limit of the Beidou satellite short message, so a lot of data Symmetric encryption is used between the sending device and the server, that is, the same key is used to encrypt and decrypt, and even data is transmitted in plain text, resulting in extremely low security; and because there is no return receipt for Beidou civil satellite communication, the communication link exists Unreliable factors make the communication of the Beidou satellite using the above-mentioned traditional encryption methods have security risks

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