File:UnionCipherDisk.nsa.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	14:53, 3 April 2006		552 × 630 (234 KB)	commons>ArnoldReinhold	'''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 three and three-quarters inches (95 mm) in diameter. It consisted of two concentric disks o

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