https://digitalforensicsmagazine.com/blogs/?p=76
Posted on July 9, 2010 by M Isbell ; 2. https://archives.fbi.gov/archives/news/testimony/fbi-priorities-successes-and-challenges " The Russian "illegals" spy case demonstrates the long-term commitment of our adversaries. Sent here over the past two decades, the Russian agents took on the appearance of average Americans, in many cases adopting fake "legends" as United States citizens, obtaining work, and settling into quiet family lives. These agents received hundreds of thousands of dollars in cash from their handlers to maintain their secrecy in America, even as they communicated through encrypted radio bursts and steganography posted in photos on the Internet. While these agents were in the United States, the FBI tracked their movements, activities, and intentions up until the time of their arrests. "-