Definition ∞ A shared security model in blockchain technology refers to an arrangement where multiple independent blockchains or decentralized applications derive their security from a common, more robust underlying chain or network. This allows smaller chains or applications to benefit from the established security and validator set of a larger network without needing to bootstrap their own. It enhances the security posture of newer or smaller protocols by leveraging collective defense. This model reduces the individual security burden.
Context ∞ News frequently discusses shared security models in the context of layer-2 solutions, parachains, or app-specific blockchains aiming to scale and enhance interoperability. This approach addresses the challenge of securing numerous independent chains, which can be vulnerable to attacks. Debates often focus on the economic implications and governance structures required for effective shared security implementation. The adoption of shared security models is a significant trend in expanding the blockchain ecosystem.
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