D334 Introduction to Cryptography - Set 5 - Part 3

Correct Answer: It ensures that a session key is not reused in future sessions

Forward secrecy ensures that session keys are not reused in future sessions, providing additional security by preventing compromise of past communications.

Correct Answer: Digital signatures

Digital signatures provide non-repudiation by ensuring that the sender cannot deny sending the message, as it is tied to their private key.

Correct Answer: RSA

RSA is commonly used in HTTPS for secure key exchanges, as it provides strong encryption and supports digital signatures.

Correct Answer: SHA-256

SHA-256 is a cryptographic hash algorithm that generates a fixed-length hash value, ensuring data integrity.

Correct Answer: To issue and manage digital certificates

A Certificate Authority (CA) is responsible for issuing, managing, and validating digital certificates used in public key infrastructure (PKI).

Correct Answer: Man-in-the-middle attack

In a man-in-the-middle attack, the attacker intercepts and potentially alters the communication between two parties without their knowledge.

Correct Answer: 256 bits

AES-256 uses a 256-bit key for encryption, providing a higher level of security than AES-128 or AES-192.

Correct Answer: RSA

RSA is widely used for generating digital signatures, which provide authentication and data integrity by verifying the identity of the sender.

Correct Answer: To verify the authenticity and integrity of a message

Digital signatures are used to verify the authenticity and integrity of a message, ensuring that it was sent by the claimed sender and has not been tampered with.

Correct Answer: ECC

Elliptic Curve Cryptography (ECC) is based on the mathematical difficulty of solving discrete logarithms, making it secure for encryption and key exchange.