[repost]
>>675910
The Soviet NKVD pioneered a lot of these kinds of techniques during the war. One of the benefits of learning Russian is that you have access to books, documentary films and dozens of TV serials covering many of the adventures of the NKVD which were classified until recent years.
I even saw one series that got into the beginnings of the cold war KGB and how spies were placed in the west by letting traitors to the Soviet Union escape to the West with their loved ones. They would even be given cash, diamonds and forged documents to help them, and told to enjoy life, and we will be in touch one day.
Counterintelligence is a complex business.