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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 ...
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 ...
High level view of the use of online codes. The online encoding algorithm consists of several phases. First the message is split into n fixed size message blocks. Then the outer encoding is an erasure code which produces auxiliary blocks that are appended to the message blocks to form a composite message. From this the inner encoding generates ...
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 ...
Notch and alphabet ring are fixed together. Changing the ring setting will therefore change the positions of the wiring, relative to the turnover-point and start position. The ring setting will rotate the wiring. Where rotor I in the A-position normally encodes an A into an E, with a ring setting offset B-02 it will be encoded into K
Sensors embedded in the forthcoming Ultrahuman Ring include temperature, heart rate and movement monitors, which enable the device to track the wearer's sleep quality, stress levels and activity ...
The code can be a consistent monoalphabetic substitution for the entire cipher or the disks can be moved periodically throughout the cipher making it polyalphabetic. For a monoalphabetic use, the sender and the person receiving the messages would agree on a cipher key setting (e.g., the "G" in the regular alphabet would be positioned next to ...