IAS QUIZ 9

Asymmetric encryption utilizes only a public key for encryption

and decryption.

• T

• F

Asymmetric encryption can be used for confidentiality but not for

authentication.

• T

• F

Plaintext is transformed into ciphertext using two keys and a

decryption algorithm.

• T

• F

A major advance in symmetric cryptography occurred with the

development of the rotor encryption/decryption machine.

• T

• F

Public-key encryption is more secure from cryptanalysis than

symmetric encryption.

• T

• F

Much of the theory of public-key cryptosystems is based on

number theory.

• T

• F

Asymmetric algorithms rely on one key for encryption and a

different but related key for decryption.

• T

• F

The encryption algorithm performs various transformation on the

ciphertext.

• T

• F

If the authenticator is encrypted with the sender's private key, it

serves as a signature that verifies origin, content, and sequencing.

• T

• F

A trap-door one-way function is easy to calculate in one direction

and infeasible to calculate in the other direction unless certain

additional information is known.

• F

• T