BlockDAG
Also known as: DAG Blockchain, Graph-Based Ledger, Parallel Block Structure
A blockchain architecture where blocks form a Directed Acyclic Graph (DAG), allowing parallel validation and greater scalability.
BlockDAG is an alternative blockchain architecture where blocks are arranged in a Directed Acyclic Graph (DAG) rather than a strict linear chain. This allows multiple blocks to be validated in parallel, improving scalability and transaction throughput. BlockDAG models are used by protocols like Kaspa, Conflux, and Fantom to overcome the limitations of traditional longest-chain consensus. These systems still preserve security and finality, often through specialized consensus algorithms like GHOSTDAG or Lachesis. BlockDAGs represent a shift towards more flexible and performant decentralized ledgers.