Cryptography and Computer Security Quiz 4

What is the study of encrypting/hiding data called?

• Cryptology

• Cryptography

• Algorithm

• Cryptanalysis

What is the reverse of encryption?

• Algorithm

• Cipher

• Decryption

• Cryptography

What is the output of encrypted plaintext data called?

• Ciphertext

• Algorithm

• Plaintext

• Key

What is the role of cryptography in computer security?

• Ensuring data integrity

• Providing authentication

• All of the above

• Achieving confidentiality

What are the two types of operations used for encrypting information?

• Substitution and Transposition

• Sorting and Filtering

• Addition and Multiplication

• Encoding and Decoding

What is the universal technique for providing confidentiality for transmitted or stored data?

• Symmetric encryption

• Asymmetric encryption

• Public-key encryption

• Stream cipher

What are the 5 ingredients in symmetric encryption?

• Plaintext, Encryption algorithm, Public key, Ciphertext, Decryption algorithm

• Plaintext, Encryption algorithm, Secret key, Ciphertext, Decryption algorithm

• Ciphertext, Secret key, Public key, Decryption algorithm, Encryption algorithm

• Plaintext, Secret key, Public key, Ciphertext, Decryption algorithm

What is a stream cipher used for?

• Encoding one character at a time

• Encoding the entire plaintext at once

• Encoding one byte at a time

• Encoding one bit at a time

What are the 2 requirements for secure use of symmetric encryption?

• Strong encryption algorithm and secure key distribution

• Public key and private key

• Symmetric key sharing and asymmetric encryption

• Ciphertext and plaintext

How does asymmetric encryption work?

• Using the same key for encryption and decryption

• Using two separate keys for encryption and decryption

• Using a stream cipher for encryption

• Using a block cipher for encryption