Definition ∞ Insertion security, in the context of authenticated data structures, refers to the property that an adversary cannot add a new element to the structure without detection. It ensures that only authorized parties can modify the data structure by appending new entries. This property maintains the integrity of the data structure against unauthorized additions.
Context ∞ Insertion security is a vital characteristic for append-only ledgers like blockchains, where new transactions or blocks are continuously added. It guarantees that the historical record cannot be altered by inserting false data. Strong insertion security is fundamental to the immutability and reliability of blockchain data, preventing malicious modifications to the ledger.
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