Unit 3

Abram was asked to explain to one of his coworkers the XOR cipher. He showed his coworker an example of adding two bits, 1 and 1. What is the result of this sum?

0

Which of these is the strongest symmetric cryptographic algorithm?

Advanced Encryption Standard

If Bob wants to send a secure message to Alice using an asymmetric cryptographic algorithm, which key does he use to encrypt the message?

Alice's public key

Which of these is NOT a characteristic of a secure hash algorithm?

Collisions should be rare.

Which of the following key exchanges uses the same keys each time?

Diffie-Hellman (DH)

Which of these has an onboard key generator and key storage facility, as well as accelerated symmetric and asymmetric encryption, and can back up sensitive material in encrypted form?

Hardware Security Module (HSM)

At a staff meeting one of the technicians suggested that the enterprise protect its new web server by hiding it and not telling anyone where it is located. Iosif raised his hand and said that security through obscurity was a poor idea. Why did he say that?

It depends too heavily upon non-repudiation in order for it to succeed.

What is a characteristic of the Trusted Platform Module (TPM)?

It provides cryptographic services in hardware instead of software

Alexei was given a key to a substitution cipher. The key showed that the entire alphabet was rotated 13 steps. What type of cipher is this?

ROT13

Illya was asked to recommend the most secure asymmetric cryptographic algorithm to his supervisor. Which of the following did he choose?

RSA

What is the latest version of the Secure Hash Algorithm?

SHA-3

Alyosha was explaining to a friend the importance of protecting a cryptographic key from cryptoanalysis. He said that the key should not relate in a simple way to the cipher text. Which protection is Alyosha describing?

confusion

A(n) _____ is not decrypted but is only used for comparison purposes.

digest

The Hashed Message Authentication Code (HMAC) _____.

encrypts the key and the message

Which areas of a file cannot be used by steganography to hide data?

in the directory structure of the file system

Proving that a user sent an email message is known as _____.

non-repudiation

Public key systems that generate random public keys that are different for each session are called _____.

perfect forward secrecy

What is data called that is to be encrypted by inputting it into a cryptographic algorithm?

plaintext

Which of these is NOT a basic security protection for information that cryptography can provide?

risk loss

Egor wanted to use a digital signature. Which of the following benefits will the digital signature not provide?

verify the receiver