In the modern era, cryptography is essential for online communication security. It plays a crucial role for information reliability, and it is based on encryption and authentication algorithms that are constructed using hard mathematical and computationally infeasible problem. However, once quantum computers become widespread, many of the regularly used cryptosystems will be completely useless, as they can be easily attacked and broken. Their growth represents a concrete threat to classical public-key protocols. This is why researchers and scientists are developing post-quantum cryptography (PQC) algorithms, exploiting problems that can be invulnerable to quantum computer attacks. Unlike quantum cryptography, which rely on quantum computing and quantum communication environments, PQC based cryptosystems run on classical computer, providing sufficient security.