Satellite transmission physical characteristic self-fusion type compression encryption algorithm for CTD marine observation data

Abstract

The invention belongs to the field of ocean big data communication transmission, and provides a satellite transmission physical property self-fusion type compression encryption algorithm for CTD (Conductivity-Temperature-Depth) observation data. By extracting an initial value secret function, first-layer physical self-fusion encryption is realized, and 33% of data volume is reduced. Time is eliminated through mutual correction of time and pressure, second-layer physical self-fusion encryption is achieved, and the data size is reduced by 20%. New parameters are generated by performing cross coding on the water temperature and the conductivity of core data, so that third-level physical self-fusion encryption is realized, and the numerical value is reduced. And then the new sequence is fixed,sliced and recombined, a string of decimal numbers is provided as secret keys by the user, and offset replacement is performed on each element data bit by bit according to the secret keys. And finally, the data is converted into a binary system, bit splicing is performed, and overall compression is performed by using an LZW (Lempel-Ziv-Welch) compression algorithm. Therefore, the security problemand data volume control of CTD observation data satellite transmission are effectively solved.

Description

technical field [0001] The invention belongs to the field of marine big data communication transmission, and proposes a self-melting compression encryption algorithm for satellite transmission physical characteristics of observation data of a CTD (Conductivity-Temperature-Depth, temperature-salt-depth observation instrument). Background technique [0002] In recent years, satellite communication has been widely used in data transmission of marine monitoring platforms due to its remarkable characteristics such as long communication distance, wide coverage area, and low data bit error rate. Although satellite data transmission has its own advantages, there are also some outstanding problems. On the one hand, there is the issue of data security. The Beidou satellite communication system with independent property rights in my country has a small coverage area and a limited amount of transmitted data. Therefore, in many cases, it is necessary to choose foreign satellite communic...

AI Technical Summary

Problems solved by technology

The compression and encryption technology of marine observation data involves the ocean field and the data compression and encryption field. It is a combination of the two fields. If the ocean observation data directly uses general compression and encryption algorithms without combining the characteristics of the data itself, it will not be possible to achieve ideal results.

Coupled with the large amount of ocean observation data and complex data types, the current research on ocean observation data compression and encryption technology has not made effective progress, and ocean data is basically packaged and transmitted in plain text.

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