Which of the following concepts is used by digital signatures to ensure integrity of the data?
A. Non-repudiation B. Hashing C. Transport encryption D. Key escrow
Correct Answer: B Section: Cryptography
Most digital signature implementations also use a hash to verify that the message has not been altered, intentionally or accidently, in transit.
A: Regarding digital security, the cryptographical meaning and application of non-repudiation shifts to mean:
A service that provides proof of the integrity and origin of data.
An authentication that can be asserted to be genuine with high assurance.
C: Digital signatures are not implemented through transport encryption.
D: Key escrow addresses the possibility that a third party may need to access keys. Under the conditions of key escrow, the keys needed to encrypt/decrypt data are held in an escrow
account (think of the term as it relates to home mortgages) and made available if that third party requests them.
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 249, 255, 261, 262