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豬圈密碼

上圖,是豬圈密碼用符號与26个字母作的密碼配對。

豬圈密碼(英語:pigpen cipher),亦稱共濟會密碼masonic cipher)或共濟會員密碼Freemason's cipher),是一種以格子為基礎的簡單替换式密码。即使使用符號,也不會影響密碼分析,亦可用在其它替代式的方法。右邊的例子,是把字母填進格子的模樣。

早在1700年代,共濟會常常使用這種密碼保護一些私密紀錄或用來通訊,所以又稱共濟會密碼[1]

範例

若使用範例的關鍵字,則明文“X marks the spot”的加密結果將呈現如下:

An example pigpen message

參考文獻

  • David Kahn, The Codebreakers. The Story of Secret Writing. Macmillan, 1967.
  • David E. Newton, "Freemason's Cipher" in Encyclopedia of Cryptology, 1998, ISBN 0-87436-772-7.
  • Martin Gardner, Codes, ciphers and secret writing, 1972, ISBN 0-486-24763-9.
  • Sarah Wray, The Trap, book, code breaking; 2008

注脚

  1. ^ Kahn, 1967, p.~772; Newton, 1998, p. 113

外部連結


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豬圈密碼
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