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De Furtivis Literarum Notis
1563 book on cryptography From Wikipedia, the free encyclopedia
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De Furtivis Literarum Notis (On the Secret Symbols of Letters) is a 1563 book on cryptography written by Giambattista della Porta.[1]
The book includes three sets of cypher discs for coding and decoding messages,[2][3] a substitution cipher improving on the work of Al-Qalqashandi,[4] and one of the earliest known music substitution ciphers.
References
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