COMPUTER NETWORKING

Detailed explanation-1: -Digital signatures are used to provide non-repudiation. Which of the following ensures a sender’s authenticity? Sender encrypts the hash of the message using his private key. The receiver can decrypt the same with the public key of the sender, ensuring authenticity of the message.

Detailed explanation-2: -The correct answer is option 4 i.e. Non-repudiation. Non-repudiation is the assurance that someone cannot deny the validity of something.

Detailed explanation-3: -In online transactions, digital signatures ensure that a party cannot later deny sending information or deny the authenticity of its signature. A digital signature is created using the private key of an asymmetric key pair, which is public key cryptography, and verified with a corresponding public key.

Detailed explanation-4: -Rivest-Shamir-Adleman (RSA) algorithm Due to this property, it has become a popular asymmetric encryption algorithm. RSA helps organizations ensure confidentiality, integrity, non-repudiation, and authenticity of the information in storage or transit.

Detailed explanation-5: -signer non-repudiation. An asymmetric key operation where the private key is used to digitally sign data and the public key is used to verify the signature. Digital signatures provide authenticity protection, integrity protection, and non-repudiation, but not confidentiality protection.