Definition ∞ The Protocol Security Layer comprises the foundational cryptographic and consensus mechanisms that protect a blockchain network from attacks and ensure data integrity. This layer includes proof of work or proof of stake algorithms, cryptographic hashing, and transaction validation rules. Its robustness is paramount for maintaining the trustworthiness and immutability of the distributed ledger. A strong security layer safeguards against malicious activities and network compromises.
Context ∞ The protocol security layer is a constant subject in blockchain news, particularly when discussing network upgrades, potential vulnerabilities, or comparisons between different consensus models. Reports often analyze audit results, attack vectors, and the economic incentives that secure the network. Understanding this layer is critical for assessing the reliability and resilience of any blockchain system.
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