OSG-CH6

Question 1

data stored on hard drives, backup tapes, cloud storage services, USB devices, and other storage media.

Answer 1

Data at rest

Question 2

data being transmitted across a network between two systems.

Answer 2

Data in motion

Question 3

stored in the active memory of a computer system, where it may be accessed by a process running on that system.

Answer 3

Data in use

Question 4

operation that easily produces output values for each possible combination of inputs but makes it impossible to retrieve the input values.

Answer 4

one-way function

Question 5

a random bit string that is the same length as the block size (the amount of data to be encrypted in each operation) and is XORed with the message.

Answer 5

Nonce

Question 6

demonstrate knowledge of a fact (such as a password or key) without actually disclosing that fact to the other individual.

Answer 6

zero-knowledge proof

Question 7

operation is divided among multiple users, no single person has sufficient privileges to compromise the security of an environment. This separation of duties and two-person control contained in a single solution

Answer 7

split knowledge

Question 8

requires that a minimum number of agents out of the total number of agents work together to perform high-security tasks.

Answer 8

M of N Control

Question 9

The third party may use the escrowed key to either restore an authorized user’s access or decrypt the material themselves

Answer 9

recovery agent

Question 10

a cryptographic key is stored with a third party for safekeeping

Answer 10

key escrow

Question 11

the time and effort required to perform a complete brute-force attack against an encryption system

Answer 11

work function