You have obviously viewed it in films for spies. It is also called the “brush pass” and involves a short interaction between amiable spies, to have a brief talk or share documents. These moves are dangerous. Other methods exist, which are improved and more secure, to transmit messages, such as having a location which is organized beforehand, that is being accessed by the two sides at varied periods.
Brush ContactMay 26, 2016 Zephyr