Question: Consider a sensor X that periodically sends a 6 4 - octet measurement to a receiver Y ( 1 octet = 8 bits ) .

Consider a sensor X that periodically sends a

64 -

octet measurement to a receiver Y

(1

octet

= 8

bits

) .

One day the administrator decided that X should encrypt the measurement data using DES in CBC mode. How many octets does X now send for each measurement? Explain your answer.

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