Wheel Cypher Secret Decoder

Wheel Cypher Secret Decoder

Item #: 204337
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$22.95
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While serving as President George Washington’s secretary of state (1790-1793), Thomas Jefferson devised an ingenious and secure method to encode and decode messages: the wheel cypher. During the American Revolution, Jefferson had relied primarily on messengers to hand-carry sensitive letters, but codes became an essential part of his correspondence when he was America’s minister to France (1784-1789) since European postmasters opened and read all letters passing through their command.

Jefferson’s wheel cypher consisted of twenty-six cylindrical wooden pieces, each threaded onto an iron spindle. The letters of the alphabet were inscribed on the edge of each wheel in a random order. By turning these wheels, words could be scrambled and unscrambled.

How to Use the Secret Decoder Wheel Cypher:
To code a message such as “meet me at noon,” the letter m is located on the wheel at the left end of the instrument; the next wheel is turned until the letter e is adjacent to the m; the third wheel is turned until the second e is next to the first e; and so on, until all words in the message are spelled out in up to 12 letters with no spaces between them. Each of the remaining rows of letters on the cylinder represents a different encryption of the message. To send the message, the sender copies the sequence of letters in any one row. The recipient arranges the letters on any row of his cylinder into the sequence received, and then rotates the whole cylinder until he recognizes a meaningful series of words. 6 1/4"l x 2 1/2" dia.

Recommended for ages 5 and up.


Learn more about Jefferson's Cypher Wheel.

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