A concept in which an expanding list of transactional records listed in a public ledger is secured using cryptography is known as what?

A concept in which an expanding list of transactional records listed in a public ledger is secured using cryptography is known as what?

• A. Blockchain
• B. Merkle Tree
• C. Public Ledger
• D. Hash Chain

Answer: (A)

Blockchain describes a growing sequence of transactional records kept in a public ledger and secured with cryptography. Each new block packages a set of transactions and includes a cryptographic hash of the previous block, linking them together into a chain that makes tampering evident. The ledger is usually distributed across many participants, and a consensus mechanism ensures all parties agree on the same history, so no single actor can rewrite past records without detection. Inside each block, a Merkle Tree is often used to efficiently verify that a particular transaction is included, but the main idea is the cryptographically linked, append-only chain of blocks that forms the distributed ledger. The other terms relate to parts or alternatives: a Merkle Tree is a data structure used within blocks, a public ledger is a general term for a shared record, and a hash chain is a simpler sequential chain of hashes not by itself the full distributed, append-only ledger.

Blockchain describes a growing sequence of transactional records kept in a public ledger and secured with cryptography. Each new block packages a set of transactions and includes a cryptographic hash of the previous block, linking them together into a chain that makes tampering evident. The ledger is usually distributed across many participants, and a consensus mechanism ensures all parties agree on the same history, so no single actor can rewrite past records without detection. Inside each block, a Merkle Tree is often used to efficiently verify that a particular transaction is included, but the main idea is the cryptographically linked, append-only chain of blocks that forms the distributed ledger. The other terms relate to parts or alternatives: a Merkle Tree is a data structure used within blocks, a public ledger is a general term for a shared record, and a hash chain is a simpler sequential chain of hashes not by itself the full distributed, append-only ledger.