The international spy museum is no more than 10 kilometers from where 3 of the Russian agents lived just outside Washington. And near the entrance to the exhibit are photos of uncovered Soviet spies. In a separate room is (1)_________________________________.
This is a car from a James Bond movie. On a normal day, this would be a hit of the exhibit, as would the pistol made to look like a lipstick and a lethal umbrella. But on this day, in light of the spy scandal, perhaps the most popular display is (2)_________________________________. It contains a hidden message. Historian Mark Stawt says this method of passing on data was used by the recently deported Russian agents.
"In this particular case, we have a purchase order. And then, underneath it, we have a secret message hidden, which comes out under ultraviolet light. (3)_________________________________. It's been around for centuries and the Russians used it in this recent case."
本帖隐藏的内容需要回复才可以浏览
作者: oralex 时间: 2016-9-20 15:37
what is called the fire school
this remarkable piece of paper
There are many different ways of doing this,but this is very tradional technic
