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Cryptography Ch. 2, Ch. 6 and 13 Flashcards | StudBud
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Cryptography Ch. 2, Ch. 6 and 13
Cryptography Ch. 2, Ch. 6 and 13
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1
What is a primary reason that AES is considered secure?
It uses a fixed key size
It requires frequent key changes
It operates in a symmetric key environment
It's resistant to brute force attacks
2
True or False: ECDSA yeilds similar security results to other schemes but has a smaller key bit length.
True
False
3
Which components are utilized in the Schnorr Digital Signature Scheme?
The sender's public key and the recipient's private key
Only the sender's private key
A random symmetric key and the recipient's public key
The sender's private and public keys along with a hash of the message
4
How is Fermat's Little Theorem used in cryptography?
It's used to calculate the greatest common divisor of two large numbers.
It determines the number of encryption rounds in a block cipher.
It ensures the secure exchange of symmetric keys over a network.
It helps generate random prime numbers for cryptographic keys.
5
True or False: AES performs 16 rounds of transformation.
True
False
6
What does Euler's Totient Function measure?
The count of prime numbers less than n.
The number of integers less than n that are coprime to n.
The number of divisors of n.
The total sum of divisors of n.
7
What does AES stand for?
Advanced Encryption System
American Encryption Standard
Advanced Encryption Standard
Advanced Encryption Sequence
8
Which of these is NOT an AES algorithm?
AES-256
AES-128
AES-512
AES-192
9
Which components are used in the ElGamal Digital Signature Scheme?
The sender's private key and the recipient's public key
The sender's public key and a hash of the message
Symmetric keys for encryption
The recipient's private key and the sender's public key
10
What is Fermat's Theorem referred to as?
Fermat's Big Theorem
Fermat's Theory
Fermat's Tiny Theorem
Fermat's Little Theorem
11
All operations in AES are performed on ____ bytes
4-bit
12-bit
16-bit
8-bit
12
What mathematical problem forms the basis for the security of the Schnorr Digital Signature Scheme?
C. Elliptic curve discrete logarithm problem
B. Integer factorization problem
D. RSA encryption/decryption problem
A. Discrete logarithm problem
13
True or False: A Digital Signature is a Mathmatical algorithm to verify a message as authentic and has integrity
True
False
14
How is Euler's Theorem used in cryptography?
To perform hash functions for secure message transmission.
To ensure that the encryption key is the same as the decryption key.
To determine the total number of keys in a cryptographic system.
To calculate the public and private keys in systems like RSA.
15
True or False: The Key Schedule in AES Generates round keys from the original Key.
False
True
16
What is the block size in AES?
128 bits
256 bits
64 bits
512 bits
17
Is AES a symmetric or asymmetric encryption algorithm?
Symmetric
Asymmetric
18
What does the ShiftRows step do in AES?
Rotates the rows in the data block to the left.
Permutes the columns in the data block.
Performs a bitwise XOR operation on the data.
Shifts the rows in the data block to the right.
19
What operation does the MixColumns transformation perform in AES?
Circular Shift
Substitution
Permutation
Linear Transformation
20
What is the primary purpose of the ElGamal Digital Signature Scheme in cryptography?
Encrypting messages securely
Signing and verifying the authenticity of messages
Ensuring message integrity during transmission
Generating random keys for secure communication
21
In AES, what does the Substitution box (S-box) primarily do?
Performs bitwise rotations
Executes modular arithmetic
Executes linear transformations
Substitutes bytes
22
True or False: The Digital Signature Algorithm (DSA) is designed for encryption or key exchange.
False
True
23
What Agency published the Federal Information Processing Standard or FIPS 186?
NIST
NCIS
CISA
FBI
24
Which key pair is used in the Elliptic Curve Digital Signature Algorithm (ECDSA)?
Recipient's private key and sender's public key
Sender's private and public keys for signing and verification
Sender's private key and recipient's public key
Symmetric keys for encryption
