METHOD FOR SECURELY SHARING DATA UNDER CERTAIN CONDITIONS ON A DISTRIBUTED LEDGER

摘要

Secure data and cryptographic key sharing on a ledger distributed on a network between a plurality of network connected devices called entities. A first entity of said plurality of entities, owner of data to be shared, determines a first encryption algorithm, obtains a first cryptographic key pair including a first cryptographic encryption key and a first cryptographic decryption key, encrypts data to be shared using said generated first cryptographic encryption key and said determined first encryption algorithm, shares encrypted data with said plurality of entities, specifies pre-requisites to be fulfilled before decryption of the shared encrypted data, determines a first predetermined number of trusted entities among said plurality of entities, defines a first threshold equal to a minimum number of entities required for decryption of the shared encrypted data among said trusted entities, computes as many secret shares of said first cryptographic decryption key as the first predetermined number of trusted entities by applying a secret sharing scheme to said first cryptographic decryption key, securely transmits said computed secret shares to the trusted entities.