phone-tapping
wire tapping AmE
telephone tapping

For this reason, hardware-based call recording is frequently conflated with telephone tapping.

He was sensitive about questions of telephone tapping.

His forte was the resourceful use of telephone tapping.

It should not be confused with telephone tapping or call recording.

This rules out telephone tapping, e-mail monitoring, and mail censorship.

Greece has been rocked by a scandal involving mobile telephone tapping.

I feel that the same issues will come up again in relation to telephone tapping.

Rules on telephone tapping are controlled, for example, at national level.

This question has achieved some notoriety in two cases concerning telephone tapping.

By far the easiest method of telephone tapping, he said, is bribing a technician.