No Summary provided as the original text is short
- OP_RETURN: A Bitcoin script opcode that allows embedding up to 80 bytes of arbitrary data in a transaction, often used for metadata storage.
- Consensus Mechanism: The method by which a blockchain network agrees on the state of its ledger, ensuring all participants validate transactions consistently.
- Zero-Day Vulnerability: A software security flaw discovered by attackers before the vendor is aware, leaving systems exposed until a patch is released.