日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

Global General

CIA declassifies WWI-era secret documents

(Agencies)
Updated: 2011-04-20 22:34
Large Medium Small

WASHINGTON?- The CIA lifted the lid on one corner of the cloak and dagger world of World War I, declassifying six of the oldest secret documents in the US government archives, the agency announced Tuesday.

The documents show top techniques used by spies, generals and diplomats to send secret messages in a diplomatic war that raged long after the guns stopped. The records reveal how invisible ink was used to send word between allies, and spies learned to open letters to read each other's secrets without leaving a trace.

One document suggests this method for passing secret messages: soaking a handkerchief or collar in a mixture of nitrate, soda and starch, then drying the fabric. The chemicals come out when the cloth is placed in water. The liquid becomes invisible ink, that can be loaded into a pen and used to write a message. The recipient develops the writing by applying a second chemical, iodate of potassium.

There's even a document written in French of the German's secret ink formula, showing the French had cracked the enemy's code.

"These documents remained classified for nearly a century until recent advancements in technology made it possible to release them," CIA Director Leon E. Panetta said in a statement Tuesday.

Recent advances in the chemistry of secret ink, and the lighting methods used to detect it have made the secrets revealed Tuesday obsolete, explained CIA spokesperson Marie E. Harf.

Documents on secret writing fall under the CIA's authority to declassify. The agency declassified more than a million historical documents last year alone, the agency said.

But the CIA was not always so eager to share these particular secrets, according to Steve Aftergood, of the Federation for American Scientists. He says the CIA resisted a Freedom of Information Act request in 2002 to release the records.

Nor was he impressed at Panetta's statement that the documents could be released now because of new technological advances.

"Invisible ink was rendered obsolete by digital encryption long ago, not in the last few years," Aftergood said.

"Director Panetta is attempting to rationalize the CIA's irrational information policies, but there is no known basis for his claim."

The documents are now available on the agency's website at the site's Freedom of Information Act Electronic Reading Room.

Scholars will also be able to examine them at the National Archives.

分享按鈕
主站蜘蛛池模板: 波多野结衣亚洲色图 | 在线观看免费黄色网址 | 免费毛片观看 | 欧美一区二区在线播放 | 另类天堂av| 免费国产黄色 | 欧美在线色 | 国产精品久久毛片 | 九九九免费视频 | 欧美日本在线观看 | 国产男女裸体做爰爽爽 | 岛国av免费在线观看 | a天堂在线观看视频 | 精品国产一 | 久久hd| 日韩无套 | 国产精品国产一区二区三区四区 | 青青草超碰在线 | 尤物在线播放 | 国产精品视频一二三区 | 成人网页在线观看 | 午夜毛片在线观看 | 午夜啊啊啊 | wwwww在线观看 | 一区二区三区在线免费 | 日日碰狠狠添天天爽 | 国产成人三级在线观看 | 天天爱天天干天天操 | 国产又长又粗 | 来射吧| 成人免费视频网站在线看 | 91色精品 | 生猴子在线观看免费视频 | 97超碰在| 久久伊人免费 | 天天看天天色 | 亚洲少妇一区二区 | 亚洲欧美字幕 | 美女国产视频 | 视频一区二区三区在线 | 日本在线黄色 |