is the insertion of bits into gaps in a data stream to frustrate traffic analysis attempts.

Traffic padding

Explanation:

Traffic padding is a way of inserting draw randomly in such a manner that it would be difficult to make traffic analysis by any intruder. It hides the traffic pattern through the insertion of dummy traffic into the network and then the intruder sees it as a different traffic pattern. But what the intruder observes is a cover mode which actually hides the systems real operation mode.