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 encryption type uses the same key for both encryption and decryption?
Answer: Symmetric encryption
Symmetric encryption uses a single shared secret key for both operations.
What is the key size used by the AES algorithm in its strongest standard configuration?
Answer: 256 bits
AES supports 128, 192, and 256-bit keys, with 256-bit being the strongest.
Which of the following is a stream cipher?
Answer: RC4
RC4 is a stream cipher that encrypts data one bit or byte at a time.
In asymmetric cryptography, which key is used to encrypt a message sent to a recipient?
Answer: The recipient's public key
Messages are encrypted with the recipient's public key so only their private key can decrypt them.
What property of a hash function ensures it is computationally infeasible to find two inputs producing the same output?
Answer: Collision resistance
Collision resistance means two different inputs should not produce the same hash value.
Which algorithm is primarily used for secure key exchange over an insecure channel?
Answer: Diffie-Hellman
Diffie-Hellman allows two parties to establish a shared secret over an untrusted network.
What does a digital signature primarily provide?
Answer: Authentication and integrity
A digital signature verifies the sender's identity and confirms the message was not altered.