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Which of the following feature makes impossible to eavesdrop on GSM radio transmission?(a) SIM(b) On the air privacy(c) SMS(d) Packet switched trafficThis question was posed to me during an online exam.Origin of the question is Global System for Mobile (GSM) in portion Wireless Systems and Standards of Wireless/Mobile

Answer»

Correct answer is (b) On the air privacy

To elaborate: The on the air privacy feature of GSM makes impossible to eavesdrop on a GSM RADIO TRANSMISSION. The privacy is made possible by encrypting the digital bit stream sent by a GSM TRANSMITTER, ACCORDING to a specific secret cryptographic key that is known only to the cellular carrier.



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