CONSENSUS PROTOCOL FOR PERMISSIONED LEDGERS

摘要

The present invention relates to a method for reaching a consensus for appending, at a current round (j), a new block of data to a permissioned ledger distributed through a network comprising network connected devices authorized by the ledger, called nodes, said method being performed by a tamper-proof computing device configured for managing securely digital keys and comprising a random number generator and a cryptoprocessor for generating signatures with said keys, and comprising, for a set of transactions to be validated, the steps of : - receiving (S2), from at least a first node (N k ), a candidate block (B j,Nk ) computed by said first node on transactions among said set of transactions, - for each received candidate block, generating a random value (RAND) (S3) by the random number generator, and generating (S4) a signed selection message comprising: an identifier of the current round (j), said received candidate block (B j,Nk ) and said generated random value (RAND) by said cryptoprocessor, - broadcasting (S5) said signed selection messages to the nodes of said network, enabling them to select the new block (B j ) to be appended to the ledger for the current round based on said random values comprised in said signed selection messages.