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WorksheetsIAS2 QUIZ Reviewer
Total questions: 45
Worksheet time: 45mins
Turning secret text back into readable form
(a)
The original readable message
(a)
Disguising a message to hide its meaning
(a)
The encrypted/hidden message is called?
(a)
An algorithm used for encryption or decryption
(a)
What do we call the science of breaking or analyzing encrypted messages?
(a)
List any FOUR (4) components of a basic cryptosystem.
(a)
Classical (a) involves an interesting combination of analytical reasoning,
Why did cryptography become important as civilizations evolved?
A. For entertainment
B. For secret communication involving power, battles, and politics
C. For writing books
D. For trade only
The earliest evidence of cryptography is found in which civilization and writing system?
(a)
Who used the Caesar Shift Cipher, and what was the usual shift value of three?
(a)
What is the main idea behind the Kamasutra Cipher?
A. Shifting letters by numbers
B. Reversing words
C. Pairing letters and substituting them
D. Using symbols instead of letters
What is the primary goal of cryptography?
(a)
Proving the sender really sent the message
(a)
Keeping data secret from unauthorized users
(a)
Ensuring the message was not altered
(a)
Proving identity
(a)
THE THREE TYPES OF CRYPTOGRAPHY
(a)
includes both cryptography and cryptanalysis.
(a)
are also called attackers.
(a)
Ciphertext is easier to read than plaintext.
TRUE
FALSE
Also known as Secret Key Cryptography or (a) ?
How many general types of cryptography are there?
A. One
B. Two
C. Three
D. Four
Which of the following are the three types of cryptography?
(Choose ALL that apply)
Symmetric Key Cryptography
Digital Certificates
Asymmetric Key Cryptography
Hash Functions
Symmetric Key Cryptography is also known as:
A. Public Key Cryptography
B. Secret Key Cryptography
C. Hash Cryptography
D. Digital Cryptography
In symmetric key cryptography, how many keys are used?
(a)
Why is key management a major problem in symmetric key cryptography?
(a)
Who officially invented public key cryptography in 1975?
(a)
Algorithm widely used for encryption and digital signatures:
(a)
RSA stands for:
(a)
Algorithm similar to Diffie–Hellman and used in GnuPG:
(a)
Asymmetric cryptography is also known as:
A. Secret-key cryptography
B. Public-key cryptography
C. Hash cryptography
D. Block cryptography
A cryptographic hash function converts data into:
(a)
Another name for a hash value:
(a)
Which of the following is NOT a property of an ideal hash function?
A. Easy to compute
B. Easy to reverse
C. Hard to find collisions
D. Hard to modify message without changing hash
What is the avalanche effect? A small change in the input produces a significantly different hash output.
Why is MD5 no longer recommended? Because it is vulnerable to collisions and can be easily broken by modern attacks.
Hash function family that includes SHA-1, SHA-2, SHA-3:
(a)
Which SHA standard was selected in 2012 and is based on the Keccak algorithm?
A. SHA-1
B. SHA-2
C. SHA-3
D. SHA-0
Which hash function is 512-bit and derived from AES?
(a)
Why are hash functions used in password storage? To protect passwords by storing irreversible hashed values instead of plain text, reducing the risk if data is breached.
Data integrity check using hash functions can detect:
A. File size
B. File ownership
C. File modification
D. File author
TRUE or FALSE Hash functions are reversible.
(a)
SHA-1 is considered secure for long-term use.
True
False
Collision resistance means collisions are impossible.
False
False
