An engineer is designing an encryption approach that uses one shared item to secure data transmissions. Which measure offers the strongest protection to ensure repeated patterns are not observed and exploited?
Use the same unchanged shared element for multiple sessions
Use hardware to protect the shared element
Change the shared element used for transmissions on a defined schedule
Increase the block size for each transmitted segment
Rotating the shared element on a schedule helps break any repeated sequence that an attacker might detect over longer periods. Simply increasing the block size does not guarantee a new sequence is created, using hardware to protect the shared item does not by itself address repetition, and relying on the same unchanged value for many sessions invites observable patterns.
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