What is a Distributed Ledger?
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A blockchain != ledger.
A blockchain is a type of distributed ledger.
Blockchain is a sequence of blocks – distributed ledgers do not require such a chain (i.e blocks being linked to one another).
Blockchain’s have ledger features but also have blockchain-features.
| Blockchain | Ledger |
| Block Structure: Chain of blocks, that are linked to one another | No requirement for chain of blocks |
| Block Sequence (genesis block starts out, then we have 1, 2, 3, 4 – can’t skip 5 to go to 6) | No requirement for sequencing in ledger |
| Public blockchains need tokens (token example = cryptocurrency), Private blockchains do not need | Tokens are optional |
| Proof of work not needed | Proof of Work needed |
| example: Corda | example: BTC |
Consensus should be considered… see:
