Cryptomenysis Patefacta
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''Cryptomenysis Patefacta, or Art of Secret Information Disclosed Without a Key'' is a 1685 non-fiction book written by John Falconer, it was only the second text written in English on the topic of
cryptography Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logy, -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of Adversary (cryptography), ...
. In 1693 it was republished as ''Rules for Explaining and Deciphering All Manner of Secret Writing''. The book serves as a guide to various cyphers, including Egyptian
hieroglyphs Ancient Egyptian hieroglyphs ( ) were the formal writing system used in Ancient Egypt for writing the Egyptian language. Hieroglyphs combined ideographic, logographic, syllabic and alphabetic elements, with more than 1,000 distinct characters.I ...
and
fingerspelling Fingerspelling (or dactylology) is the representation of the letter (alphabet), letters of a writing system, and sometimes numeral systems, using only the hands. These manual alphabets (also known as finger alphabets or hand alphabets) have often ...
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References

1685 non-fiction books 1693 non-fiction books Cryptography books English-language non-fiction books {{nonfiction-book-stub