Examples
- A famous use of a book cipher is in the Beale ciphers, of which document no. 2 uses a (variant printing of) the United States Declaration of Independence as the key text.
- Richard Sorge's spy ring in Japan used a book cipher which the Japanese were unable to cryptanalyze even after capturing both Sorge and his radio operator / code clerk. It used an edition of a statistical handbook of Germany as the key text.
- In the American Revolution, Benedict Arnold used a book cipher, sometimes known as the Arnold Cipher, which used Sir William Blackstone's Commentaries on the Laws of England as a key text.
Read more about this topic: Book Cipher
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“Histories are more full of examples of the fidelity of dogs than of friends.”
—Alexander Pope (1688–1744)
“No rules exist, and examples are simply life-savers answering the appeals of rules making vain attempts to exist.”
—André Breton (1896–1966)
“In the examples that I here bring in of what I have [read], heard, done or said, I have refrained from daring to alter even the smallest and most indifferent circumstances. My conscience falsifies not an iota; for my knowledge I cannot answer.”
—Michel de Montaigne (1533–1592)