The infamous intercepts of Royal family conversations was a warning for the first generation of mobile users.  Many subsequent conversations were preceded with a warning that they could be tapped or taped with impunity.

The second generation mobile networks, in particular GSM, provided a level of security that prevented casual eavesdropping. 

Now though there is good new for the paparazzi.  Researchers David Hulton and Steve Muller, with a degree of ingenuity and Moore’s law of processing power, have presented a method of how encrypted conversations can be intercepted, recorded and decrypted.

Celebrities had better be prepared.