03/10/2021

A Danish Diplomatic Cipher with Table Swtiching in the 17th Century

I uploaded another small article "A Danish Diplomatic Cipher with Table Swtiching in the 17th Century" using the same source as yesterday. One interesting feature of this cipher is that it has five different substitution alphabets, which are switched by indicators. This appears to belong to the 1680s or thereabout, not to the time of Christian IV.

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