RU2702078C1 - Method of protecting command-and-measurement system of spacecraft (sc) from unauthorized interference by an illegitimate user - Google Patents

Abstract

FIELD: control system; space equipment.

SUBSTANCE: invention relates to protection of command-and-measurement system of spacecraft from unauthorized interference, possible from illegitimate users. Method includes encrypting control commands transmitted to the spacecraft board, received commands are decoded in the spacecraft command-and-measurement system and converted into control signals. Data base of decryption algorithms, which are marked with their own identification feature, is formed in the spacecraft memory. Transmitted command automatically includes a randomly selected feature of the decryption algorithm. Received commands are decrypted by an algorithm with an identification feature specified in the composition of the received command.

EFFECT: high protection of the command-measuring system of a spacecraft (SC) from an unauthorized interference by an illegitimate user.

1 cl

Description

The invention relates to the field of automated spacecraft control systems (SC), and the protection of the command and measurement system of the spacecraft from unauthorized interference, possible from illegitimate users.

A patented invention is known as an analogue: patent No. 2130641, IPC H04L 9/00, 1998, “Method and device for protecting information from unauthorized access” (Bozhich V.I., Skubilin M.D., Spiridonov O.B.). The invention relates to computer technology and information systems and can be used as a personal information converter for data exchange by government, law enforcement, defense, industrial and commercial institutions, when it becomes necessary to store and transmit confidential information. EFFECT: synthesis of a method of protecting information from unauthorized access with minimal loss of information and inertia, and devices with minimal hardware and information redundancy, inertia, and the ability to perform both a direct task of encrypting information and an inverse task of decrypting it with maximum speed, minimum loss of information with minimal hardware and energy costs and with maximum reliability. A way to protect information from unauthorized access involves transformations in which the original data file is divided into blocks of variable length and in each block a variable shift is made along the ASCII code ring of each block symbol. The device comprises an interface unit, a buffer memory unit, a conversion unit, a control unit and an addressing unit, it allows one to increase the conversion performance and reduce the operation algorithm by an order of magnitude. The disadvantage of this method is the complexity of the technical implementation of the totality of blocks in the composition of the claimed device and their algorithmic pairing on board the spacecraft.

Known invention protected by patent: Patent No. 2439693, IPC G06F 21/24, 2010 "Method for protecting text information from unauthorized access" (Minakov VA, Miroshnikov VV, Tolstikhin GN). The invention relates to non-cryptographic methods of protecting information from unauthorized access and can be used in secure data transmission systems. The technical result is to increase the security of text information transmission by using distortions in data transmission systems without the use of secret keys and pin codes. The method includes: encrypting text message A, transmitting it, decrypting the received text message A, providing the recovered message to the user, while prior to encryption on the transmitting side, the original text message A is distorted using a known PIN code P by displaying the i-th word, where i = 1, I, and I is the number of words in the original message, in the corresponding code D _i according to the table of possible values, replacing the code D _i with the code DK _i by shifting the code D _i along the ring by the number of lines k in the PIN code P forward direction And at the receiving side after deciphering reduced code D _{i i-th} received word by shifting the code DK _i on the ring by a predetermined in the pin-code P number of row k in the opposite direction is carried out mapping code D _i to the corresponding ie word in the table of possible values . The disadvantage of this method is the ability to decrypt any transmitted message if the pin code of the distortion of the original text message is known.

Known invention protected by patent: patent No. 2588178, IPC B64G 3/00, 2015 "The method of controlling spacecraft in flight and the ground control complex for its implementation" (Sinkovsky N.V., Savelyev A.N., Lazurenko A. V., Mukhin E.V., Remnev O.L.). The invention relates to a method for controlling spacecraft and a ground-based control complex. To control spacecraft, the flight control center receives an operational control signal from the onboard control system of the spacecraft, processes the received signal, forms a sign of the presence of emergency parameters, if there is one, they form a transit command to receive telemetric information in the current communication session, and transmit it to the onboard space control complex apparatus, write the parameters of the operational control information to the server of the central database of the hardware-software complex c ntra flight control. The ground-based spacecraft control center contains a flight control center, command and measuring systems, data transmission systems, a ballistic center, ballistic information collection systems, a GLONASS center, synchronization and single-time systems, control system planning systems, a system control center, a payload control center, backup automated information technology system for processing telemetric information connected in a certain way. Efficiency of processing telemetric information for diagnosing on-board systems of spacecraft is provided. The disadvantage of this method is the possibility of unauthorized access to transmitted messages.

Known patent-protected invention is a prototype invention: patent No. 2554090, IPC H04K 1/00, 2013 "Method of protecting the command and measuring system of a spacecraft" (Panko S.P., Sukhotin V.V., Mishurov A.V., Evstratko V. .V., Gorchakovsky A.A., Kilin G.P., Ryabushkin S.A., Vildanov A.I., Shatrov V.A.). The technical result consists in the ability to block commands received from an illegitimate user, including in protecting against unauthorized interference in the operation of the command and measurement system of the spacecraft. For this, the coordinates of the signal source are evaluated and compared with the coordinates of the ground control complex stored in the onboard memory. With close coincidence of coordinates, a decision is made on the legitimacy of the signal source. And when the coordinates do not match, the commands received from the illegitimate signal source are blocked. Thus, the task of protecting the command line of the spacecraft and, in particular, eliminating unauthorized access of illegitimate users to the command and measurement system of the spacecraft is solved. The disadvantage of the proposed method is the impossibility of blocking commands received from an illegitimate signal source if the signal source is in close proximity to the ground control complex.

The aim of the proposed invention is to increase the security of the command and measurement system of the spacecraft (SC) from unauthorized interference by an illegitimate user.

This goal is achieved in the claimed method of protecting the command and measuring system of a spacecraft (SC) from unauthorized interference by an illegitimate user, according to which the encryption of control commands transmitted onboard the SC is performed, the received commands are decrypted in the command and measurement system of the SC and converted into control signals. In the storage device of the spacecraft form a database of decryption algorithms indicated by its own identification tag. A randomly selected attribute of a decryption algorithm is automatically included in the transmitted command. The received commands are decrypted according to the algorithm with the identification sign indicated in the composition of the received command.

The feasibility of the proposed method of protecting the command and measuring system of a spacecraft (SC) from unauthorized interference by an illegitimate user, and its practical significance are confirmed as follows. The composition, content and own characteristic of decryption algorithms are known only to the developer of these software products. The formation of the database onboard the spacecraft is carried out immediately before its launch into orbit. The sign of the decryption algorithm without operator intervention is automatically randomly selected and entered into the control team immediately before it is sent to the spacecraft. Therefore, even if an illegitimate user is aware of decryption algorithms, preliminary notification of the next sign of the decryption algorithm used on board the spacecraft is not possible.

Thus, the possibility of technical implementation of the proposed method of protecting the command and measuring system of a spacecraft (SC) from unauthorized interference by an illegitimate user and its practical significance are not in doubt.

Claims (1)

A method for protecting the command and measuring system of a spacecraft (SC) from unauthorized interference by an illegitimate user, according to which the encryption of control commands transmitted to the spacecraft is performed, the received commands are decrypted in the command and measurement system of the spacecraft and converted into control signals, and a database of decryption algorithms designated by its own identification tag, a randomly selected prize is automatically included in the transmitted command On the basis of the decryption algorithm, the received commands are decrypted according to the algorithm with the identification sign indicated in the composition of the received command.