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File:UnionCipherDisk.nsa.jpg
来自维基百科,自由的百科全书
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File:UnionCipherDisk.nsa.jpg
Union
Cipher
Disk
exhibit at the w:National Cryptologic Museum in 2005. Caption reads: "Made of light yellow heavy card stock, the
Union
Cipher
Disk
was
File:The Union Cipher Disk (5176186267).jpg
DescriptionThe
Union
Cipher
Disk
(5176186267).
jpg
Derived from a photo taken at the National Cryptologic Museum,
NSA
. Date Unknown date Unknown date Source