Johannes Trithemius
Steganographia
https://en.wikipedia.org/wiki/Frankfurt
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https://en.wikipedia.org/wiki/La_Roche_University
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https://en.wikipedia.org/wiki/University_of_Pittsburgh
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https://en.wikipedia.org/wiki/AT%26T_Labs
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https://en.wikipedia.org/wiki/Florham_Park,_New_Jersey
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https://en.wikipedia.org/wiki/Cryptologia
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https://en.wikipedia.org/wiki/David_Kahn_(writer)
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https://en.wikipedia.org/wiki/Mainz
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https://en.wikipedia.org/wiki/Microform
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https://en.wikipedia.org/wiki/Cryptogram
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