Distributed GNSS space division ciphering communication method

Abstract

A distributed GNSS space division ciphering communication method is suitable for floor distributed communicating system based on GNSS, which is principally characterized in that before the data sending terminal DTE transmits the data, the self located communication zone according to the latitude and longitude information provided by the GNSS signals, and the cipher key corresponding to the zone is selected to cipher the transmission data. Because the zone cipher key has fixed length, the ciphering adopts a block cipher system. The sending terminal and receiving terminal DTE have a same region cipher key comparison table simultaneously, the receiving terminal DTE can search the region cipher key comparison table to obtain the decipher cipher key by recognizing the region number on the cipher text head section added by the sending terminal, and then uses the cipher key to decipher the cipher text and acquire the plaintext. The communication cipher key in the method dynamically changes with the variation of the located region of the sending terminal, which has free communication region partitioning dimension assisted with enrich and various encryption algorithms, thereby greatly improving ciphering flexibility, decoding-proof performance and tamper-proof performance.

Description

technical field [0001] The invention relates to a distributed GNSS space division encryption communication method, which belongs to the technical field of navigation and positioning communication. Background technique [0002] It is the most important content of communication network to provide users with safe and reliable confidential communication. Data encryption technology is the key technology to solve the security of information network. In order to protect the data from being eavesdropped or modified during transmission, the data must be encrypted. Even if the data is stolen, it cannot be restored to plaintext because the thief does not have the key. In this way, the security of the data is guaranteed, and the receiver can restore the ciphertext to the correct plaintext because the receiver has the correct key. According to different keys, there are two main types of modern encryption systems: conventional key cryptography (also known as symmetric key cryptography) a...

AI Technical Summary

Problems solved by technology

The public key cryptography system uses different encryption keys and decryption keys, the encryption key is public, and the decryption key is only known by the decryptor. There is no key management problem in public key cryptography, but its realization is based on cutting-edge mathematical problems. The calculation is very complicated, and the speed of encryption and decryption is far inferior to that of the conventional key cryptosystem

Images