Is tapping of telephone an invasion on the right to privacy?

In People’s Union of Civil Liberties v. Union of India the Supreme Court has ruled that the “telephone conversation is an important facet of a man’s private life.” Conversations on the telephone are often of an intimate and confidential character. The right to hold a telephone conversation in the privacy of one’s home or office without interference can certainly be claimed as “right to privacy”. This means that telephone tapping would infract Article 21 unless it is permitted under the procedure established by law.