A computer-implemented method of providing nodes, such as data structures and devices, with access to a network is disclosed, and a corresponding network architecture. At least one core network access provider controls real time access to the network across the layers of a protocol stack for the network, and sequentially assigns a network communication address to the or each access-requesting node. The assigned network address is encoded with a unique parameter of the node and a unique parameter of the node user, in a sequential identifier ledger which is distributed in real time to all of the network-connected nodes. Each node processes the ledger to verify its sequential integrity and, upon determining a sequential integrity loss, the ledger record causing the loss is identified and an alert comprising the identified record is broadcast to the nodes across the network. The core network access provider cancels network access for the node to which the network communication address corresponding to the identified ledger record was assigned, upon either identifying the ledger record at the verifying step or receiving an alert.
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