"A thriller from the Cold War times" - that's just one of the comparisons experts both in the US and Russia are giving to the spy scandal currently unraveling in America. Indeed court papers released by the US Department of Justice detail behaviour more commonly found in an espionage novel. The document lists secret methods adopted by the alleged spy-ring, techniques which many experts have dismissed as fictional. Among the accusations is that an identity for one of the members was borrowed from a dead Canadian. It's also alleged that the suspects sent messages using 'invisible ink' and buried text within images. The court papers also say agents were communicating with each other using coded language and cliched phrases.