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A dead drop or dead letter box is a method of espionage tradecraft used to pass items or information between two individuals (e.g., a case officer and an agent, or two agents) via a secret location. By avoiding direct meetings, individuals can maintain operational security .
In some cases, the dead drop might be equipped with a device to destroy its contents unless it is opened properly. Representative dead drop device Signals to tell a courier, or a case officer if there is no intermediate courier, that the dead drop needs service can be as simple as a piece of colored tape on a lamp post or perhaps a set of ...
However, Hanssen's suspicions did not stop him from making one more dead drop. After leaving a friend at an airport on February 18, 2001, Hanssen drove to Virginia's Foxstone Park. He placed a white piece of tape on a park sign to signal his Russian contacts that there was information at the dead drop site.
or similar. The only possible response is "yes"; otherwise, there is just dead air. This sudden signal drop was also one of the primary arguments of analog proponents against moving to digital systems. However, the "five bars" displayed on many cell phones does directly correlate to the signal strength rating. [citation needed]
Dead Drop, a location-based spy game for iPhone, It's that tie to real-world locations that services like Foursquare do so well that games tend to miss. Dead Drop on iPhone, Android brings the ...
A SIGINT Activity Designator (or SIGAD) identifies a signals intelligence (SIGINT) line of collection activity associated with a signals collection station, such as a base or a ship.
Robert Hanssen, who was convicted of spying for the Soviet Union and Russia, conducted dead drops there. [1] One account relates: Within a mile of his home, Foxstone Park meanders along Wolftrap Creek through Hanssen's neighborhood and a golf course. He used Foxstone Park's rustic wooden sign as his signal site, marking it with a piece of ...
Five Dead Giveaways Tell Burglars You're Not Home Kim Sayer - Getty Images Burglars don't want to get caught, which is why they usually wait until you're out of your house before they break in.