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A secret decoder ring (or secret decoder) is a device that allows one to decode a simple substitution cipher—or to encrypt a message by working in the opposite direction. [ 1 ] As inexpensive toys, secret decoders have often been used as promotional items by retailers, as well as radio and television programs, from the 1930s through to the ...
A Code-O-Graph-like secret decoder ring was featured in the 1983 movie A Christmas Story as an object of both joy and frustration. Richard Farina - Been Down So Long It Looks Like Up To Me (1966) - talks about it in Chapter one, listing it first in the list of the "only possessions and necessities of his life."
Among those items were secret decoders, shake-up mugs for drinking Ovaltine (the show's sponsor product) and secret decoder rings for the Little Orphan Annie secret society. [9] The 1934 fan club's member's handbook included a simple substitution cipher with a resulting numeric cipher text.
Caesar ciphers can be found today in children's toys such as secret decoder rings. A Caesar shift of thirteen is also performed in the ROT13 algorithm, a simple method of obfuscating text widely found on Usenet and used to obscure text (such as joke punchlines and story spoilers), but not seriously used as a method of encryption. [13]
Elizebeth Smith Friedman (August 26, 1892 – October 31, 1980) was an American cryptanalyst and author who deciphered enemy codes in both World Wars and helped to solve international smuggling cases during Prohibition.
The Geological Society of London wouldn't even admit her until 1904 because women could not be admitted before then. She discovered many new creatures during her time on Earth. Image credits ...