Meteorological satellite data encryption method
A data encryption, meteorological satellite technology, applied in the direction of encryption device with shift register/memory, etc., can solve problems such as illegal remote sensing satellite images, and achieve the effect of not increasing the code rate, simple and reliable hardware equipment, and easy key replacement
Active Publication Date: 2015-03-04
SHANGHAI SATELLITE ENG INST
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Problems solved by technology
However, the data transmitted by the satellite to the ground is easily received or intercepted by other countries, so that the remote sensing satellite images of the country where the satellite was launched can be "illegally" obtained
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[0044] The embodiments of the present invention are described in detail below: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following implementation example.
[0045] figure 1 As shown, the schematic diagram of the encryption method using the output feedback working mode disclosed in the present invention. The ground data transmission sub-system generates MGK, and transmits the MGK to the star to participate in encryption through the remote control of the ground measurement and control station; at the same time, the data transmission sub-system transmits the PBK generated by MGK using MSK for DES encryption through a safe and reliable way on the ground. Go to the ground receiving station, decrypt the ciphertext of the data flow, and obtain the plaintext.
[0046] figur...
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The invention discloses a meteorological satellite data encryption method, which achieves data encryption by adopting an output feedback working mode. Concretely, a ground data transmission subsystem generates an MGK (MESSAGE KEY), and remote-control data input is performed through a ground measurement and control station so as to transmit the MGK to a satellite to participate encryption; and meanwhile, the MGK is encrypted by utilizing an MSK (MASTER KEY) according to a DES (Data Encryption Standard) so as to generate a PBK (PUBLIC KEY), the data transmission subsystem transmits the PBK to a ground receiving station in a ground safe and reliable manner, and a data flow encrypted message is decoded so as to obtain a plaintext. The meteorological satellite data encryption method has the advantages as follows: bit rate and bit error rate are not increased; low probability of break can be achieved, simple encryption and decryption algorithm can be achieved, and hardware equipment is simple and reliable; data can be encrypted in a real-time manner, and a secret key is easy to change; and the switching function between secret transmission and unencrypted transmission can be achieved. The meteorological satellite data encryption method provides references and design considerations to payload data encryption system design of a polar-orbiting meteorological satellite data transmission system.
Description
technical field [0001] The invention relates to a data encryption method, in particular to a design method of a polar-orbiting meteorological satellite payload data encryption scheme. Background technique [0002] my country's meteorological satellite Fengyun-3 is my country's second-generation polar-orbiting meteorological satellite, which is used to realize global, all-weather, three-dimensional, and quantitative remote sensing. Its digital transmission system completes information processing with multiple payloads and different code rates. With the increasing demand for meteorological satellite detection services, satellites will carry more payloads capable of completing different detection tasks in the future; in addition, with the development of payload technology, payload detection will achieve higher resolution, more detection frequency band coverage, higher sensitivity technology. [0003] Space remote sensing has been widely used in the civilian field, and all spac...
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IPC IPC(8): H04L9/06
Inventor 刘波王震赵晋
Owner SHANGHAI SATELLITE ENG INST