Because of its open nature, these blockchains must be secured with cryptography and a consensus system like proof of work (PoW) . A private or permissioned blockchain, on the other hand, requires each node to be approved before joining.
Because of its open nature, these blockchains must be secured with cryptography and a consensus system like proof of work (PoW) . A private or permissioned blockchain, on the other hand, requires each node to be approved before joining.