The authentication to be affected by use of asymmetric crypto system and hash function is known as:

Correct option is C

A digital signature is a cryptographic method that ensures the authenticity and integrity of electronic data or messages. It utilizes an asymmetric cryptosystem (a pair of public and private keys) along with a hash function. The process involves creating a unique digital fingerprint (hash) of the message, which is encrypted with the sender's private key. The recipient can verify the signature by decrypting it with the sender's public key and comparing it with the hash of the received message. This mechanism provides secure and reliable authentication.
Information Booster:
· Digital Signature:
· Ensures both authenticity (verifying the sender’s identity) and integrity (ensuring the message has not been altered).
· Widely used in secure electronic communications, such as online transactions, contracts, and document authentication.
· A legal framework under acts like the IT Act 2000 in India provides it the same legal validity as handwritten signatures.
Additional Knowledge:
· E-commerce (Option a): Refers to the buying and selling of goods/services online. It does not involve cryptographic authentication directly.
· Virtual Signature (Option b): Not a standard term in cryptography; it might refer to digital representations of traditional signatures, but lacks cryptographic security.
· E-verification (Option d): Refers to electronic methods of verifying identity or documents, often through OTPs or database cross-checks, which do not necessarily involve asymmetric cryptosystems or hash functions.