An Append-Only Ledger is a data structure where new entries can only be added sequentially to the end. Existing records cannot be altered or deleted, ensuring a permanent and tamper-evident history of transactions. This fundamental property provides integrity and immutability, making it a foundational element for many blockchain and distributed ledger technologies. Each new entry typically references the previous one, forming an unbreakable chain.
Context
In cryptocurrency news, the append-only nature of blockchain ledgers is a central point when discussing transaction finality and security. This characteristic is often cited as a key differentiator from traditional financial databases, providing transparency and resistance to censorship. Ongoing discussions frequently concern the balance between this immutability and the need for data privacy or correction mechanisms in specific regulated applications.
Research demonstrates a sequential hashing function can create a verifiable, pre-consensus timeline, fundamentally reducing messaging overhead for fast finality.
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