Security - Chapter 3

Which standard was approved by NIST in late 2000 as a replacement for DES?

A. AES

If Bob receives an encrypted reply message from Alice, whose private key is used to decrypt the received message?

A. Bob's Private key

When Bob needs to send Alice a message with a digital signature, whose private key is used to encrypt the hash?

A. Bob's private key

Which of the following is more secure than software encryption?

A. Hardware Encryption

What type of cryptographic algorithm creates a unique digital fingerprint of a set of data?

A. Hash

What widely used commercial asymmetric cryptography software can be used for encrypting files and email messages?

A. PGP

What term best describes when cryptography is applied to entire disks instead of individual files or groups of files?

A. full disk encryption

What type of cryptography uses two keys instead of just one, generating both a private and a public key?

B. Asymmetric

What is a block cipher algorithm that operates on 64-bit blocks and can have a key length from 32 to 448 bits?

B. Blowfish

Which of the following are considered to be common asymmetric cryptographic algorithms? (Choose all that apply.)

B. Elliptic Curve Cryptography D. Digital Signature Algorithm

What type of message authentication code uses hashing to authenticate the sender by using both a hash function and a secret cryptographic key?

B. HMAC

What alternative term can be used to describe asymmetric cryptographic algorithms?

B. Public key cryptography

Which of the following asymmetric cryptography algorithms is most commonly used?

B. RSA

The simplest type of stream cipher, one in which one letter or character is exchanged for another, is known as what?

B. Substitution

Which of the following is a public key system that generates random public keys that are different for each session?

B. perfect forward secrecy

The SHA-1 hashing algorithm creates a digest that is how many bits in length?

C. 160 bits

After the DES cipher was broken and no longer considered secure, what encryption algorithm was made as its successor?

C. 3DES

Which key exchange requires Alice and Bob to each agree upon a large prime number and related integer?

C. Diffie-Hellman

What cryptographic method, first proposed in the mid-1980s, makes use of sloping curves instead of large prime numbers?

C. ECC

If using the MD5 hashing algorithm, what is the length to which each message is padded?

D. 512 bits

Data that is in an unencrypted form is referred to as which of the following?

D. Cleartext

What term describes data actions being performed by endpoint devices, such as printing a report from a desktop computer?

D. Data-in-use

In cryptography, which of the five basic protections ensures that the information is correct and no unauthorized person or malicious software has altered that data?

D. Integrity

Which type of cryptographic algorithm takes an input string of any length, and returns a string of any requested variable length?

D. Sponge

What type of cipher takes one character and replaces it with one character, working one character at a time?

D. Stream Cipher

Which of the following is not one of the functions of a digital signature?

D. protect the public key

Encryption is the practice of transforming information so that it is secure and cannot be accessed by unauthorized parties.

False

Obfuscation is making something well known or clear.

False

One of the first popular symmetric cryptography algorithms was RSA.

False

A collision attack is an attempt to find two input strings of a hash function that produce the same hash result.

True

Ciphertext is the scrambled and unreadable output of encryption.

True

In information technology, non-repudiation is the process of proving that a user performed an action

True

The XOR cipher is based on the binary operation eXclusive OR that compares two bits.

True

Wireless data networks are particularly susceptible to known ciphertext attacks.

True

Which hash algorithm's primary design feature is two different and independent parallel chains of computation, the results of which are then combined at the end of the process?

C. RIPEMD

In which type of encryption is the same key used to encrypt and decrypt data?

C. Symmetric

What technology uses a chip on the motherboard of the computer to provide cryptographic services?

C. TPM

Asymmetric cryptographic algorithms are also known as private key cryptography.

False

GNU Privacy Guard a proprietary software that runs on different operating systems

False

What is the U.S. federal government standard for digital signatures?

d. Digital Signature Algorithm