Cryptography Fundamentals Flashcards
7 cards from real Certified Ethical Hacker practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Cryptography Fundamentals flashcards as text
Which algorithm is an example of asymmetric (public-key) cryptography?
Answer: RSA
RSA is a widely used asymmetric algorithm based on factoring large prime numbers.
What is steganography?
Answer: Hiding data within other non-secret files
Steganography conceals the existence of a message by embedding it in other media.
What does HMAC provide that a simple hash does not?
Answer: Message authentication using a secret key
HMAC combines a hash with a secret key to verify both integrity and authenticity.
Which protocol secures HTTP traffic by encrypting the connection?
Answer: TLS
TLS encrypts the communication channel, enabling HTTPS.
An attacker captures and retransmits a valid encrypted authentication token. What attack is this?
Answer: Replay attack
A replay attack reuses captured valid data to gain unauthorized access.
What is the main weakness of the original DES algorithm?
Answer: Its 56-bit key is too short
DES's 56-bit key length makes it vulnerable to modern brute-force attacks.
Which cryptographic concept ensures a sender cannot deny having sent a message?
Answer: Non-repudiation
Non-repudiation, typically via digital signatures, prevents denial of authorship.