COMPARISON OF COMPRESSION ALGORITHMS AND HASH FUNCTIONS OF READY-MADE SOFTWARE SOLUTIONS IN THE CONTEXT OF CREATING YOUR OWN APPLICATION

With the rapid development of information technology, working with electronic data has become easy to implement and commonly used. As a result, most organizations have eventually switched entirely to electronic data storage systems. However, the amount of information is increasing exponentially every year, which requires the use of larger storage facilities and resources to process it. In addition, the consumption of information in systems creates increasing risks of data compromise. One of the ways to solve the described problems is to use a software solution for data compression with integrity control by cryptographic hash functions. The article analyzes the lossless data compression algorithms and hash functions used in off-the-shelf software solutions, and additionally compares the hash functions with the State Standard of Ukraine 7564:2014 Kupyna and analyzes the functionality of off-the-shelf solutions. Based on the results of the study, the Deflate compression algorithm was chosen for practical implementation. Compared to other options, the Kupyna hash function performs at the same level or exceeds some indicators, which shows the quality of the algorithm. Most off-the-shelf