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Substitution Cipher Based on The Voynich Manuscript

ID: 0cd3ca6d-62b3-539f-87b9-64b9f680b5a8

STIX ID: report--0cd3ca6d-62b3-539f-87b9-64b9f680b5a8

Feed Name: Schneier on Security

Date Published: 2025-12-08

Date Updated: 2026-04-19

Author: Bruce Schneier

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A blog post highlights an academic paper introducing the Naibbe cipher, a verbose homophonic substitution system implementable with 15th-century methods that produces ciphertext resembling the Voynich Manuscript while remaining decipherable. The work supports the viability of the manuscript-as-cipher hypothesis by reproducing key statistical properties across Latin and Italian plaintexts.

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