A website administrator has received an alert

from an application designed to check the integrity of the companys website. The alert indicated that the hash value for a particular MPEG file has changed. Upon further investigation, the media appears to be the same as it was before the alert.

Which of

the following methods has MOST likely been used?

A. Cryptography

B. Time of check/time of use

C. Man in the middle

D. Covert timing

E. Steganography