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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 ...
The second Code-O-Graph was the "Photo-Matic" unit. The badge had a space for a picture of the owner, to make it a photo-ID badge. The advent of World War II affected the Code-O-Graph availability: the two previous models were made of brass , and the attack on Pearl Harbor , which propelled the United States into World War II, caused the U.S ...
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]
A series of three rotors from an Enigma machine, used by Germany during World War II Exploded view of an Enigma machine rotor:1-Notched ring, 2-Dot marking the position of the "A" contact, 3-Alphabet "tyre" or ring, 4-Electrical plate contacts, 5-Wire connections, 6-Spring-loaded pin contacts, 7-Spring-loaded ring adjustment pin, 8-Hub, through which fits the central axle, 9-Finger wheel, 10 ...
Any two transparencies printed with black rectangles, when overlaid reveals the message, here, a letter A (gridlines added for clarity) Sharing a secret with an arbitrary number of people, n, such that at least 2 of them are required to decode the secret is one form of the visual secret sharing scheme presented by Moni Naor and Adi Shamir in 1994.
Another legend from radio days is the "Secret Decoder Ring." No radio program ever offered such a premium, but many are convinced that such existed. By the early 1960s, a "decoder ring" was offered by PF Shoes, in comjunction with the Jonny Quest primetime television cartoon. After that, a few more "decoder rings" were offered, including one by ...
Method 1: Google Images From a Desktop Computer. If you use Google Chrome as your primary browser, the easiest way to complete a reverse image search is through Google Images. Just right-click the ...
The Wavelet Scalar Quantization algorithm (WSQ) is a compression algorithm used for gray-scale fingerprint images. It is based on wavelet theory and has become a standard for the exchange and storage of fingerprint images.