Probabilistic Finality

Definition ∞ Probabilistic finality describes a characteristic of certain blockchain consensus protocols where the likelihood of a transaction being reversed diminishes significantly with each new block added to the chain. While not absolute, the chance of reversal becomes exceedingly small after a sufficient number of confirmations. This differs from absolute finality, where transactions are irreversible once confirmed.
Context ∞ The concept of probabilistic finality is a key distinguishing feature among various blockchain protocols, particularly within proof-of-work systems like Bitcoin. News often discusses the trade-offs between this method and absolute finality, which is common in proof-of-stake networks, concerning security and transaction assurance. Comprehending this distinction is vital for evaluating the risk and dependability of diverse digital asset transactions.