WEATHER OR NOT ENCRYPTED

DOCID: 3604361SECRE I SXYll'<IWeather or Not-Encrypted?I I8ee.-ef 8avin .This paper describes some of the special security measures introduced inNorth Vietnamese weather communications which proued to be unique and ·.. ·effectively deceptive.INTRODUCTION· Practically all weather as we know and experience it ·occurs in thetroposphere, the region of the earth's atmosphere which extends fromthe surface of the earth to approximately 29,000 feet over the poles and61,000 feet over the equator. For thi...