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  2. Grille (cryptography) - Wikipedia

    en.wikipedia.org/wiki/Grille_(cryptography)

    If the message is written vertically, it is taken off horizontally and vice versa. After filling in 32 letters, the board is turned through 90 degrees and another 32 letters written (note that flipping the board horizontally or vertically is the equivalent). Shorter messages are filled with null letters (i.e., padding). Messages longer than 64 ...

  3. Steganography - Wikipedia

    en.wikipedia.org/wiki/Steganography

    The same image viewed by white, blue, green, and red lights reveals different hidden numbers. Steganography (/ ˌ s t ɛ ɡ ə ˈ n ɒ ɡ r ə f i / ⓘ STEG-ə-NOG-rə-fee) is the practice of representing information within another message or physical object, in such a manner that the presence of the concealed information would not be evident to an unsuspecting person's examination.

  4. List of steganography techniques - Wikipedia

    en.wikipedia.org/wiki/List_of_steganography...

    Image of a tree with a steganographically hidden image. The hidden image is revealed by removing all but the two least significant bits of each color component and a subsequent normalization. The hidden image is shown below. Image of a cat extracted from the tree image above. Concealing messages within the lowest bits of noisy images or sound ...

  5. Easter egg (media) - Wikipedia

    en.wikipedia.org/wiki/Easter_egg_(media)

    The secret room in Adventure with Warren Robinett's credit. Adventure is typically regarded as one of the first video games to feature an Easter egg.. An Easter egg is a message, image, or feature hidden in software, a video game, a film, or another—usually electronic—medium.

  6. Games on AOL.com: Free online games, chat with others in real ...

    www.aol.com/games/play/sia-fufla/word-search-secrets

    Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.

  7. Shibboleth - Wikipedia

    en.wikipedia.org/wiki/Shibboleth

    A furtive shibboleth is a type of a shibboleth that identifies individuals as being part of a group, not based on their ability to pronounce one or more words, but on their ability to recognize a seemingly innocuous phrase as a secret message.

  8. 5 hidden messages on the dollar bill

    www.aol.com/lifestyle/2016-07-28-5-hidden...

    We come in contact with it all the time, but the markings on the one-dollar bill remain shrouded in mystery. Until now. 1. The Creature. In the upper-right corner of the bill, above the left of ...

  9. 4chan - Wikipedia

    en.wikipedia.org/wiki/4chan

    4chan Homepage on May 3, 2023 Type of site Imageboard Available in English Country of origin United States Owner Hiroyuki Nishimura (since 2015) Created by Christopher Poole Services 4chan Pass URL 4chan.org Advertising Yes Commercial Yes Registration None (except for staff) Launched October 1, 2003 (21 years ago) (2003-10-01) Current status Active 4chan is an anonymous English-language ...