Modern iron doors are made of various materials, but manufacturer technologies. They wear one common goal — ensuring the maximum safety of the working space from attacks from outside, which allows you to reliably protect their own real estate from hacking and theft. As for the production necessity, such systems remain very relevant, both for the protection of the warehouse, and to restrict the admission to the company’s office building. The installation and configuration of code castles on such systems adds several more points to the overall level of security of the entire system as a whole. It remains only to carefully analyze numerous offers in the market, from a variety of manufacturers, to choose the optimal ratio of the cost and quality of the product.