Abstract: There is provided a method for synchronization of node databases in a database system, said database system comprising a plurality of validation nodes each comprising a node database, and, optionally one or more client nodes, where one of the validation nodes is a primary validation node, the primary validation node having received at least one transaction message from another validation node or a client, the transaction message comprising instructions to modify the node databases, where each of the nodes stores, in its node database, a chain of data blocks, where each data block in the block chain comprises at least a cryptographically unambiguous identifier of the previous data block.

Abstract: There is provided a method for synchronization of node databases in a database system, said database system comprising a plurality of validation nodes each comprising a node database, and, optionally one or more client nodes, where one of the validation nodes is a primary validation node, the primary validation node having received at least one transaction message from another validation node or a client, the transaction message comprising instructions to modify the node databases, where each of the nodes stores, in its node database, a chain of data blocks, where each data block in the block chain comprises at least a cryptographically unambiguous identifier of the previous data block.