Question

What is ‘Len’ (desirable number of pseudorandom bits) field in the case of CCMP PTK computation?

(a) 256

(b) 384

(c) 568

(d) 298

This question was posed to me by my school principal while I was bunking the class.

This is a very interesting question from IEEE 802.11i WLAN Security in section Wireless Network Security and Network Security Overview of Cryptograph & Network Security

Answer 1

The correct answer is (b) 384

To elaborate: The ‘Len’ value in the case of CCMP is 128+128+128 = 384 bits.