Non-Repudiation 1.2

Question 1

Describe the concept of PROOF OF INTEGRITY

Answer 1

• Verifies data has not changed.
• Any data remains accurate and consistent.

Question 2

How does a HASH contribute to PROOF OF INTEGRITY?

Answer 2

• Creates a short string of text based on data within the plain text.
• Anything changes with the data, then the HASH also changes.

Question 3

What happens to a HASH if the data changes?

Answer 3

• If the data changes, then the hash changes.

Question 4

Important consideration when using a HASH

Answer 4

• A HASH doesn’t associate data with an individual.
• Only tells you if the data has changed.

Question 5

What is indicated if a HASH has changed?

Answer 5

• The data has changed or potentially has been compromised.

Question 6

What is another application of a HASH?

Answer 6

• Authenticates the origin or sender of the data, or authentication.

Question 7

How does a DIGITAL SIGNATURE assist in guaranteeing PROOF OF ORIGIN?

Answer 7

• A DIGITAL SIGNATURE provides NON-REPUDIATION by making sure the signature is not fake and confirms the data came from the sending party.