Definition ∞ Perpetual chain security refers to the long-term, sustained robustness of a blockchain network against various forms of attack, ensuring its continued operation and data integrity indefinitely. This involves designing economic models and cryptographic mechanisms that maintain sufficient security even as block rewards decrease or network usage patterns change. It addresses the challenge of funding ongoing security costs, such as validator incentives, over extended periods. Achieving perpetual security is crucial for the enduring value and trustworthiness of a blockchain.
Context ∞ The concept of perpetual chain security is a critical long-term consideration for proof-of-work and proof-of-stake blockchains, particularly as the issuance of new tokens diminishes. Discussions often focus on alternative revenue streams for validators, such as transaction fees or maximal extractable value, to ensure adequate security budgets. Research explores sustainable economic models that can adapt to changing network conditions and maintain a high level of defense against potential attacks.
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