Definition ∞ Chain history security pertains to the cryptographic integrity and immutability of a blockchain’s historical record of transactions. This security ensures that once a transaction is recorded and sufficiently confirmed, it cannot be altered or reversed. It relies on the cumulative computational work or staked capital that secures prior blocks, making it economically infeasible to rewrite past events. The strength of this security is a fundamental attribute of a trustworthy blockchain.
Context ∞ The concept of chain history security is a critical element in assessing the robustness of various blockchain protocols, frequently highlighted in news regarding network attacks or protocol upgrades. Maintaining strong chain history security is paramount for preventing double-spending and preserving trust in the ledger’s accuracy. Debates often focus on the trade-offs between transaction finality, decentralization, and the computational or economic resources required to sustain this security.
Blockchain Knowledge
Cryptocurrency Foundation
Cryptospace Newsfeed
