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CS Professional · Artificial Intelligence, Data Analytics and Cyber Security - Laws and Practice · Internet and Other Technologies

In a permissioned blockchain network operated by a consortium of Indian banks, which feature most clearly distinguishes it from a public permissionless blockchain such as Bitcoin?

A permissioned blockchain restricts participation: only vetted and authorised members can validate transactions or view the ledger. Hash-linked blocks, replication and immutability are shared features of both permissioned and public blockchains, so they do not separate the two models.

  1. AOnly participants who have been vetted and granted access can validate transactions and read the ledgerCorrect
  2. BTransactions are recorded in blocks linked by cryptographic hashes
  3. CEvery copy of the ledger is replicated across multiple nodes
  4. DRecords once confirmed are extremely difficult to alter

Explanation

In a permissioned network, access to join, validate and often read the ledger is controlled by an administrator or consortium. Hash-linked blocks, replication across nodes and tamper resistance are common to both permissioned and permissionless blockchains, so they do not distinguish the two types.

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