The system of the data protection for the critical computer systems (Atomic Power Plant) which is transferred through network Internet, between the atomic power plants and National Committee of the Atom Energetic is developed. It is based on the new developed method, which combines symmetric and asymmetric algorithm enciphering of the data, such as electronic digital signature, based on RSA (Rivest Shamir Adleman) technology, and GOST 28147-89 algorithm. Due to this protection of the transmitted confidential information in critical computer systems in energetic is essentially improved.
