According to press reports, the FBI received court permission to use this technique to spy on suspected Mafia members in New York.

6. Cell phone SIM card compromise: If attackers can get possession of a cell phone briefly, they can use commercially available software to download and read SIM cards and their store of phone numbers, call logs, SMS messages, photos and so on.

For instance is software on a USB stick that claims to enable both the download and the display of the data.

7. Law enforcement wiretapping based on voice print: Phone company voice switches include software that can search all conversations going through it for voices that match sets of voiceprints. Whenever the switch makes a match, it can trigger a recording of the conversation and alert law enforcement officials, says James Atkinson, an expert in technical surveillance countermeasures.

The feature is designed to support communications assistance for law enforcement (CALEA) -- the law that requires phone companies to provide access under court order to specific communications traffic.