Method for generating a series of random numbers

METHOD FOR FORMING A CHAIN ​​OF RANDOM NUMBERS

FIELD OF TECHNOLOGY

The claimed solution relates to the field of information processing, in particular, to a method and device for generating a chain of random numbers.

LEVEL OF TECHNOLOGY

The closest analogue to the claimed solution is a method and a device for generating random numbers, disclosed in the application US 2015/0341178 (A1), publ. 11/26/2015.

However, the known solution does not provide reliable storage of data on random numbers due to the lack of the possibility of forming a chain of random numbers. Also in the famous¹ the solution provides encryption and decryption of transmitted data, transfer of certificates, authorization and other authentication in the process of exchanging data between the client and the server, which complicates the algorithm for generating random numbers and increases the risk of errors in the exchange of data.

DISCLOSURE OF THE INVENTION

The technical problem, the solution of which the stated solution is aimed at, is to ensure that no one generates an unpredictable chain of random numbers by means of a client, a server and a device for generating a chain of random numbers without the ability to influence the result in order to obtain benefits for none of the parties involved in the formation of the chain, with the ability to check by at the end of the session, the correspondence of the entire formed chain to the declared algorithm.

The technical result is to obtain an unpredictable random number for anyone at each step of the game session. An additional technical result is to ensure the possibility of checking the entire chain of random numbers by the client at the end of the game session for compliance with the fact that they were obtained in accordance with all stages of the method.

To achieve the specified technical result, a method for generating a chain of random numbers has been developed, comprising the stages at which, by means of a device for generating a chain of random numbers, a generated private key of a game session and a random number generated by a client are received from the server; generate a new random number based on the values ​​of the received random number and the private key; generating a new private key of the gaming session as a hash of the obtained private key of the gaming session and the value of the said new random number; form a chain of blocks, where the first information block

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contains information about the received generated private key of the gaming session, and the second information block - information about the new private key of the gaming session, save the generated chain of blocks in the memory device.

Also, a device for generating a chain of random numbers has been developed, capable of: receiving from the server the generated private key of the game session and the random number generated by the client; generate a new random number based on the values ​​of the received random number and the private key; generate a new private key of the game session as a hash of the obtained private key of the game session and the value of the mentioned new random number; form a chain of blocks, where the first information block contains information about the received generated private key of the gaming session, and the second information block contains information about the new private key of the gaming session; save the generated block chain in the storage device. BRIEF DESCRIPTION OF DRAWINGS

For a better understanding of the essence of the invention, and in order to more clearly show how it can be carried out, further reference will be made, only by way of example, to the accompanying drawings, in which:

fig. 1 is a block diagram of a gambling game system.

IMPLEMENTATION OF THE USEFUL MODEL

In accordance with the block diagram shown in FIG. 1, a gambling game system, in a particular example of its implementation, contains at least one client 1, a server 2 and a device 3 for generating a chain of random numbers. These elements of the system can be implemented on the basis of at least one processor or microcontroller, modified in software and hardware in such a way as to perform the functions assigned to them below. The random number chaining device 3 can additionally be configured to perform the functions of an Ethereum smart contract by methods known from the prior art.

When the user on the client 1 launches an application for the game or initiates the creation of a game session, the client 1 generates a corresponding request to the server 2 to obtain the public key of the game session. The generated request is sent to server 2, which, in accordance with the software and hardware algorithm embedded in it, creates a game session. At the beginning of the game session, the private key of the game session is generated on server 2, which can be, for example, a private 256-bit key generated by the method of generating private keys for the Ethereum wallet, which further increases the reliability of the key transfer.

Next, server 2, based on the private key of the game session, generates a public key using methods known from the prior art and sends it to client 1. Together with the public key, server 2 can also send a request to receive a random number generated by the client from client 1. Accordingly, after receiving the public key in automatic mode or upon request from server 2, client 1 generates its own random number, previously unknown to server 2 (client seed) and sends it to server 2. Additionally, together with the random number, client 1 can send information about the value interval for a random number, which determines the minimum and maximum value of the random number requested by the client. Also additionally client 1 can be

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is configured to display the sent random number to the user, and the user, if desired, can change the random number before sending it to the server 2.

Server 2 sends the received random number generated by the client and the generated private key of the game session to the device 3 for generating a chain of random numbers, which generates a new random number based on the values ​​of the received random number and the private key, for example, according to the formula:

PublicRandomResult [i] = Hash (ServerSecretHash [il], ​​ClientRandomSeed [i]), where ServerSecretHash [il] is the generated private key of the game session, and ClientRandomSeed [i] is a random number generated by the client.

Also, the device 3 for generating a chain of random numbers generates a new private key of the game session as a hash of the obtained private key of the game session and the value of the mentioned new random number, for example, according to the formula:

ServerSecretHash [i] = Hash (ServerSecretHash [il], ​​PublicRandomResult [i]), where ServerSecretHash [il] is the private key of the game session, and PublicRandomResult [i] is a new random number.

In the event that information about the value interval for a random number is additionally received from client 1 to server 2, then server 2 also transmits said information about the value interval to the device 3 for generating a chain of random numbers, and the formation of a new random number based on the values ​​of the received random number and the private key is carried out taking into account the information about the value interval for a random number specified by the client, for example, according to the formula:

PublicRandomResult [i] = Hash (ServerSecretHash [il], ​​ClientRandomSeed [i])% (Max [i] - Min [i] + 1) + Min [i]);

Further, the device 3 for generating a chain of random numbers forms a chain of blocks, where the first information block contains information about the received generated private key of the gaming session, and the second information block contains information about the new private key of the gaming session. The generated chain of blocks is stored in a storage device, which, for example, is located in the device 3 for generating a chain of random numbers and is a random access memory. The new random number generated by the device 3 can be sent to the client 1 and represent the dropped out pseudo-random number for the given game step. The unpredictability and large hash length (256 bits) determines the uniformity of the dropout of random numbers and the absence of any significant shift in modulus.

Thus, since the new random number is generated based on the values ​​of the random number of client 1 and the private key generated by server 2, it is unpredictable for client 1, server 2 and said device 3, i.e. the achievement of the specified technical result is ensured.

The use of information about the requested intervals when generating a new random number will further increase the reliability of storing the data of the random numbers. At the same time, the initial server key (private key of the game session), the sequence of client random numbers and intervals uniquely determine all game results. The presence of intervals as input data allows avoiding an ambiguous interpretation of the received random numbers. At the end of the game session, server 2 opens the private session key and the entire game history to client 1. The player can send the story directly to the random number generating device 3 and the said device 3 will confirm that the random numbers were generated according to the rules described above and in accordance with the code of the smart contract itself, which means that server 2 could not change the results during the game,

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and client 1 predict these results in advance. Thus, the formation of a chain of blocks, where the first information block contains information about the received generated private key of the gaming session, and the second information block - information about the new private key of the gaming session, will provide the ability to check the entire chain of random numbers by the player at the end of the gaming session for compliance with that they were obtained in accordance with all the steps of the method, i.e. in an unpredictable manner for client 1, server 2, and random number chaining device 3. Also, client 1 can be configured to automatically check that the entire chain of random numbers was generated according to the previously described algorithm.