Abstract
JSON is probably one of the most popular data formats in the Internet of Things (IoT). It has gained popularity among developers due to its easy readability. The disadvantage of this format is the size of the resulting document and the associated bandwidth requirements. In order for us to be able to transfer such data securely, it is necessary to secure it before transferring it. Often, this data is compressed before it is encrypted. This article deals with a non-standard method of data compression, which reduces the computational demands on the device side. It should be noted that many of these devices are powered by batteries with limited capacity.