Ed is correct. There are many ways information leaks out and secrets are stolen. A good counterespionage specialist take this into consideration. However, the inspection for electronic surveillance devices comes first.
Why are sweeps done first?
Why are sweeps done first?
• Bugging is the easiest intelligence collection technique to discover.
• To eliminate (or prove) bugging before accusing people.
And, why are the most effective sweeps conducted pro-actively?
• Intelligence collection is a leisurely process. Conversations and information are collected – in many ways – long before they are used against you. Until this collected intelligence is used, no harm is done. No losses suffered. Pro-active sweeps detect snooping early – thus, drastically reducing the potential for loss.
• Smart clients don't wait until they "think they are being bugged."
• Losses are always more costly than bug sweeps.