Data Encryption Chapter 3 Quiz

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What is a characteristic of symmetric encryption?

Uses the same key for encryption and decryption (correct)

Slower and more complex than asymmetric encryption

Uses different keys for encryption and decryption

Requires sharing the private key with unauthorized parties

Which encryption method is typically faster and easier to implement?

Asymmetric encryption

Symmetric encryption (correct)

Triple DES encryption

Quantum encryption

What is the most widely used symmetric encryption cipher mentioned in the text?

Blowfish

Data Encryption Standard (DES)

RSA

Advanced Encryption Standard (AES) (correct)

In asymmetric encryption, how many keys are used?

Two Signup and view all the answers

What type of key is shared publicly in asymmetric encryption?

Public key Signup and view all the answers

Which organization uses the Advanced Encryption Standard (AES) according to the text?

National Security Agency (NSA) Signup and view all the answers

What is data encryption?

The process of converting plaintext into encrypted ciphertext Signup and view all the answers

What is decryption?

The process of converting ciphertext into plaintext Signup and view all the answers

What is the purpose of encryption keys?

To allow only authorized users to decrypt the encrypted data Signup and view all the answers

How does encryption aid in digital transformation?

By making data unreadable without a key, thus ensuring security Signup and view all the answers

In encryption, what does the ciphertext represent?

Encrypted data accessible by authorized users with the right key Signup and view all the answers

What role does the encryption key play in the encryption process?

Ensuring only authorized users can decode the encrypted data Signup and view all the answers

What is the main advantage of asymmetric encryption over symmetric encryption?

More flexible key sharing Signup and view all the answers

What is a common approach in encryption that combines symmetric and asymmetric encryption?

Encrypting the symmetric key with the recipient's public key Signup and view all the answers

Why is a hybrid approach combining symmetric and asymmetric encryption often used?

It balances security and efficiency Signup and view all the answers

What cryptographic algorithm is named after its inventors Ron Rivest, Adi Shamir, and Leonard Adleman?

RSA Signup and view all the answers

Which mathematical concept does the RSA cipher rely on?

Prime factorization Signup and view all the answers

What does encrypting data twice achieve in asymmetric encryption?

Ensures only sender can decrypt the data and verifies sender's identity Signup and view all the answers

What is the purpose of the key in a columnar transposition cipher?

To number the columns for encryption Signup and view all the answers

Which type of cipher reorders the letters but does not disguise them?

Transposition cipher Signup and view all the answers

What is the key used for in a columnar transposition cipher?

To number the columns during encryption Signup and view all the answers

How does a columnar transposition cipher differ from a substitution cipher?

It reorders plaintext symbols without disguising them Signup and view all the answers

In a columnar transposition cipher, what happens if the key contains repeated letters?

The columns cannot be numbered correctly Signup and view all the answers

What characteristic of a key is specified in a columnar transposition cipher according to the text?

Does not contain any repeated letters Signup and view all the answers

What is the key factor that makes cracking RSA extremely difficult?

Determining the original prime numbers Signup and view all the answers

What is one of the oldest known ciphers according to the text?

Substitution cipher Signup and view all the answers

What does a substitution cipher do to each letter or group of letters?

Maps them onto other letters Signup and view all the answers

What is the key factor in a monoalphabetic substitution system?

The 26-letter string corresponding to the full alphabet Signup and view all the answers

In a Caesar cipher, what does 'a' become?

'D' Signup and view all the answers

What is the general name for a system where each symbol in the plaintext maps onto another letter?

Monoalphabetic substitution Signup and view all the answers