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      Question

      Consider the following statements regarding digital

      signatures under the IT Act, 2000: 1. A digital signature uses an asymmetric crypto system. 2. A digital signature must involve a hash function. 3. The private key and public key together constitute a key pair unique to the subscriber.  Which of the statements given above are correct?
      A 1 and 2 Correct Answer Incorrect Answer
      B 1 and 3 Correct Answer Incorrect Answer
      C 2 and 3 Correct Answer Incorrect Answer
      D 1, 2 and 3 Correct Answer Incorrect Answer
      E Only 1 Correct Answer Incorrect Answer

      Solution

      Section 3 of the IT Act defines digital signatures as authentication using an asymmetric cryptosystem and a hash function. Asymmetric cryptography necessarily involves a mathematically linked public key and private key, collectively known as a key pair, which is unique to the subscriber. The hash function ensures integrity of the electronic record by converting data into a fixed-length hash value. Since all three statements accurately describe statutory and technical elements of a digital signature, option D is correct.

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