It's very easy, has been for a long time. See the story of Israeli Eli Cohen, an operative in Syria. https://en.wikipedia.org/wiki/Eli_Cohen https://en.wikiped

It's very easy, has been for a long time. See the story of Israeli Eli Cohen, an operative in Syria. https://en.wikipedia.org/wiki/Eli_Cohen https://en.wikipedia.org/wiki/Eli_Cohen