Surveillance Countermeasures: A Serious Guide T... -

: Elena started with Passive Physical Surveillance Detection . She didn't look over her shoulder; instead, she used shop windows and car mirrors to establish a baseline of the people and vehicles around her.

: To confirm her suspicions, she executed a Surveillance Detection Route (SDR) . She made a series of "innocent" turns—stopping for gas, then doubling back toward a grocery store. Surveillance Countermeasures: A Serious Guide T...

Safely at a "cold" location, Elena shifted from physical to . : Elena started with Passive Physical Surveillance Detection