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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]
Nonrepudiation is the integrity of the data to be true to its origin, which prevents possible denial that an action occurred. [3] [1] Increasing non-repudiation makes it more difficult to deny that the information comes from a certain source. In other words, it making it so that you can not dispute the source/ authenticity of data.
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.
Information security is the practice of protecting information by mitigating information risks. It is part of information risk management. [1] It typically involves preventing or reducing the probability of unauthorized or inappropriate access to data or the unlawful use, disclosure, disruption, deletion, corruption, modification, inspection, recording, or devaluation of information.
Integrity; Authenticity; Availability; Utility; These attributes of information are atomic in that they are not broken down into further constituents; they are non-overlapping in that they refer to unique aspects of information. Any information security breach can be described as affecting one or more of these fundamental attributes of information.
Message authentication or data origin authentication is an information security property that indicates that a message has not been modified while in transit (data integrity) and that the receiving party can verify the source of the message. [1] Message authentication does not necessarily include the property of non-repudiation. [2] [3]
ISO 22380:2018 Security and resilience – Authenticity, integrity and trust for products and documents – General principles for product fraud risk and countermeasures, is an international standard developed by ISO/TC 292 Security and resilience and published by the International Organization for Standardization in 2018.
In cryptography, a message authentication code (MAC), sometimes known as an authentication tag, is a short piece of information used for authenticating and integrity-checking a message. In other words, it is used to confirm that the message came from the stated sender (its authenticity) and has not been changed (its integrity).