Which common use case of cryptographic concepts involves ensuring that a user cannot deny an action they performed?
Supporting obfuscation
Supporting confidentiality
Supporting non-repudiation
Supporting authentication
Non-repudiation binds an action or message to a specific identity so the individual cannot later repudiate (deny) having performed it. Digital signatures, created with the sender's private key and verifiable with the corresponding public key, are the standard cryptographic method used to achieve this property.
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