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  2. Non-repudiation - Wikipedia

    en.wikipedia.org/wiki/Non-repudiation

    In law, non-repudiation is a situation where a statement's author cannot successfully dispute its authorship or the validity of an associated contract. [1] The term is often seen in a legal setting when the authenticity of a signature is being challenged. In such an instance, the authenticity is being "repudiated". [2]

  3. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    Further, some non-repudiation schemes offer a timestamp for the digital signature, so that even if the private key is exposed, the signature is valid. [ 18 ] [ 19 ] Digitally signed messages may be anything representable as a bitstring : examples include electronic mail, contracts, or a message sent via some other cryptographic protocol.

  4. Qualified digital certificate - Wikipedia

    en.wikipedia.org/wiki/Qualified_digital_certificate

    The need for non-repudiation and authentication of electronic signatures was originally addressed in the Electronic Signatures Directive 1999/93/EC to help facilitate secure transactions, specifically those that occur across the borders of EU Member states.

  5. Signcryption - Wikipedia

    en.wikipedia.org/wiki/Signcryption

    In cryptography, signcryption is a public-key primitive that simultaneously performs the functions of both digital signature and encryption. Encryption and digital signature are two fundamental cryptographic tools that can guarantee the confidentiality, integrity, and non-repudiation. Until 1997, they were viewed as important but distinct ...

  6. AS2 - Wikipedia

    en.wikipedia.org/wiki/AS2

    Upon the receipt and successful verification of the signature on the MDN, the original sender will "know" that the recipient got their message (this provides the "Non-repudiation" element of AS2). If there are any problems receiving or interpreting the original AS2 message, a "failed" MDN may be sent back.

  7. Digital Signature Algorithm - Wikipedia

    en.wikipedia.org/wiki/Digital_Signature_Algorithm

    The digital signature provides message authentication (the receiver can verify the origin of the message), integrity (the receiver can verify that the message has not been modified since it was signed) and non-repudiation (the sender cannot falsely claim that they have not signed the message).

  8. Electronic authentication - Wikipedia

    en.wikipedia.org/wiki/Electronic_authentication

    In the case of a qualified electronic signature as defined in the eIDAS-regulation, the signer's identity is even certified by a qualified trust service provider. This linking of signature and authentication firstly supports the probative value of the signature – commonly referred to as non-repudiation of origin. The protection of the message ...

  9. Undeniable signature - Wikipedia

    en.wikipedia.org/wiki/Undeniable_signature

    An undeniable signature is a digital signature scheme which allows the signer to be selective to whom they allow to verify signatures. The scheme adds explicit signature repudiation, preventing a signer later refusing to verify a signature by omission; a situation that would devalue the signature in the eyes of the verifier.