FIELD: data processing.
SUBSTANCE: invention relates to distributed registry systems and blockchain systems. Implementations of the description include receiving, by a smart contract service provider, comprising a trusted computing execution environment (TEE) from a client associated with a target blockchain, request for operation of the crosschain data of one or more blockchain networks, other than the target blockchain, wherein the smart contract service provider is outside the target blockchain network; sending, by a smart contract service provider, to a data visiting service provider, a crosschain data request; receiving, by the smart contract service provider, the crosschain data from the data visiting service provider; generating, by means of TEE, the result using crosschain data and returning, by the smart contract service provider, the result to the client.
EFFECT: technical result consists in improvement of reliability of protection from unauthorized access to generated and stored information.
63 cl, 6 dwg
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