The cifra delle caselle a XVI Century superencrypted cipher. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Bonavoglia, Paolo
• Is Part Of: Cryptologia. Volume 44:Issue 1(2020)
• Page Start: 39
• Page End: 52
• Publication Date: 2020-01-02
• Subjects: Hieronimo Franceschi -- nomenclator -- Renaissance -- superencryption -- Vigenère; Cryptography -- Periodicals; 652.8
• DOI: 10.1080/01611194.2019.1609132
• Languages: English
• ISSNs: 0161-1194

Abstract

Abstract: Superencryption was widely introduced after the XVIII Century for improving the security of codes; the basic idea is of encrypting a second time an already code-encrypted text, with a different cipher, usually a MASC or Vigenère cipher. But now in the State Archive of Venice, a few XVI Century superencrypted messages were found, using the so-called cifra delle caselle, first with a small two-digit nomenclator, then superencrypted with a grata a 24 × 26 grid of numbers.