Research On Compression And Encryption Algorithms For Spectrum Monitoring Data

With the development of radio spectrum monitoring,the number of spectrum monitoring equipment is increasing,and many devices generate a large amount of monitoring data every minute,and the storage pressure brought by these large amounts of spectrum monitoring data is also increasing.In order to alleviate this pressure and ensure that spectrum monitoring data is transmitted more securely on the network,this paper studies the real-time compression and encryption algorithms for spectrum monitoring data.1.Research on real-time compression algorithm for spectrum monitoring data.According to the characteristics of spectrum monitoring data,the lossless compression of Huffman coding,RLE coding,LZ77 coding,LZ78 coding and LZW coding is realized in the spectrum monitoring field.From the perspectives of implementation principle,compression ratio and compression speed,this paper proposes A real-time compression algorithm for spectrum monitoring data based on LZW algorithm.According to the high real-time performance required by the spectrum monitoring data,the algorithm changes the reading and writing mode of the file,realizes the real-time compression from input to output,and gives up the original dictionary search mode of the LZW compression algorithm,directly adopting the fastest search.Hash search shortens the compression time from 56 s to 1.5s in the same dictionary size.In addition,according to the high similarity of the spectrum monitoring data,the FIFO method is used to improve the entry matching rate and the dictionary is used.The size has also been changed to a custom operation,reducing the 40% compression ratio under normal conditions to 26%.The improved compression algorithm obtained in the real data environment of real equipment has achieved a significant increase in compression speed and a significant reduction in compression ratio,indicating that the improved real-time compression algorithm can be applied to spectrum monitoring.2.Research on encryption algorithms for spectrum monitoring data.Aiming at the security problem of spectrum monitoring data transmission,this paper proposes a hybrid algorithm based on DES algorithm and RSA algorithm.The hybrid encryption algorithm not only preserves the high security of the RSA encryption algorithm and the high encryption speed of the DES encryption algorithm,but also compensates for their respective shortcomings.The way to achieve hybrid encryption.is that the DES encryption algorithm is used to encrypt the data,and the RSA encryption algorithm is used to encrypt the DES key.3.The real-time compression and encryption operation of the collected data is completed on the PC using the real spectrum monitoring and scanning device,and the whole process is completely realized.The comparison between the decrypted and decompressed data and the original data shows that the improved lossless compression algorithm and hybrid encryption algorithm have perfect functions and good performance,which can meet the requirements of the spectrum field and meet the expected requirements.