Blockchain Technology Features

All four statements are technically correct. Blockchain utilizes cryptographic hashing to enable read access for relevant entities while preventing retroactive tampering or alteration (1). It operates as a distributed ledger where complete transactional histories are replicated across network nodes and synchronized rapidly via consensus mechanisms (2). Consortium block networks represent a hybrid framework that bridges public decentralization with private permissioned rules to control data visibility (3). Finally, cryptographic immutability ensures that once blocks are validated and committed to the ledger, modifying or deleting historical entries is computationally impossible (4).