Untitled
これらの文書は1917年および1918年に作成されたもので、透明インクの配合や読み取り方、相手に気付かれないよう封筒を開封する方法などが記載され
ている。100年近く機密扱いとされていたが、現在の技術の進歩により機密にしておく必要がなくなったとのことだ、文書の原本は国立公文書館に収蔵されて
おり、CIAのWebサイトでも文書のコピーをPDF形式でダウンロードできる（Freedom of Information Act）。
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— スラッシュドット・ジャパン - 透明なインクの配合など、CIAが最古の機密文書を公開 (via kogumarecord)
Reblogged 10 months ago from otsune (Originally from kogumarecord)
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