Which of the following terms refers to a mechanism which proves that the sender really sent a particular message?
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A. B. C. D.A.
The term that refers to a mechanism that proves that the sender really sent a particular message is Non-repudiation. Non-repudiation is a security concept that ensures that the sender of a message cannot deny sending it.
In other words, it is the ability to prove that a message or transaction was sent by the person or entity claiming to have sent it, and that the message has not been altered in transit. This is typically achieved through the use of digital signatures or other cryptographic techniques.
Confidentiality, on the other hand, refers to the protection of sensitive information from unauthorized access or disclosure. This is typically achieved through the use of encryption or access controls.
Authentication is the process of verifying the identity of a user, device, or system. This is typically achieved through the use of usernames, passwords, biometric factors, or other authentication methods.
Integrity refers to the assurance that data has not been tampered with or altered in any way. This is typically achieved through the use of checksums, hash functions, or other techniques that can detect changes to the data.
In summary, Non-repudiation is the term that refers to a mechanism that proves that the sender really sent a particular message, and it is achieved through the use of digital signatures or other cryptographic techniques.