Definition ∞ An unrevoked allowance refers to a standing permission previously granted by a user to a smart contract or decentralized application to spend a specific amount or an unlimited quantity of their tokens. This authorization remains active until explicitly canceled by the user. If the decentralized application becomes compromised or is malicious, an unrevoked allowance can be exploited to drain funds from the user’s wallet without further approval. It poses a persistent security vulnerability.
Context ∞ News often highlights the dangers associated with unrevoked allowances, especially after security incidents where users’ funds were stolen through exploited permissions. Crypto security experts consistently advise users to regularly audit and revoke any unnecessary or unused allowances. Tools designed to manage these permissions are gaining prominence as essential safeguards for protecting digital assets in the decentralized ecosystem.
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