Solution

The Correct answer is Option 2: A-II, B-III, C-IV, D-I. Below is the detailed explanation of each match:

Digital Signature:

• A Digital Signature is a cryptographic technique used to confirm the authenticity and integrity of a digital document or message.
• It ensures that the message comes from a verified source and has not been tampered with during transmission.
• Thus, Digital Signature corresponds to II (Confirms authenticity and integrity).

Hash Function:

• A Hash Function is a mathematical algorithm that converts input data into a fixed-size string of characters, which is typically a digest.
• It is commonly used in cryptographic applications to verify data integrity, as even a small change in the input results in a completely different hash value.
• Hence, Hash Function corresponds to III (Produces a fixed-size digest).

AES (Advanced Encryption Standard):

• AES is a widely used symmetric encryption algorithm that encrypts data with a single shared key for both encryption and decryption.
• It is designed for fast and secure encryption of data in various applications, such as file encryption and secure communications.
• Therefore, AES corresponds to IV (Symmetric encryption algorithm).

RSA (Rivest-Shamir-Adleman):

• RSA is an asymmetric encryption algorithm that uses a pair of keys (public and private) for encryption and decryption.
• It is widely used for secure data transmission and digital signatures.
• Thus, RSA corresponds to I (Asymmetric encryption algorithm).