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  2. List of Facebook features - Wikipedia

    en.wikipedia.org/wiki/List_of_Facebook_features

    Live streaming. In August 2015, Facebook began to allow users to live stream video. Streams appear on the News Feed, and users can comment on them in real-time. Live broadcasts are automatically saved as a video post to the streamer's page. The feature was positioned as a competitor to services such as Meerkat and Periscope.

  3. Stream cipher - Wikipedia

    en.wikipedia.org/wiki/Stream_cipher

    Stream cipher. The operation of the keystream generator in A5/1, an LFSR-based stream cipher used to encrypt mobile phone conversations. A stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream ( keystream ). In a stream cipher, each plaintext digit is encrypted one at a time with the ...

  4. Keystream - Wikipedia

    en.wikipedia.org/wiki/Keystream

    Keystream. In cryptography, a keystream is a stream of random or pseudorandom characters that are combined with a plaintext message to produce an encrypted message (the ciphertext). The "characters" in the keystream can be bits, bytes, numbers or actual characters like A-Z depending on the usage case. Usually each character in the keystream is ...

  5. Salsa20 - Wikipedia

    en.wikipedia.org/wiki/Salsa20

    Salsa20 and the closely related ChaCha are stream ciphers developed by Daniel J. Bernstein. Salsa20, the original cipher, was designed in 2005, then later submitted to the eSTREAM European Union cryptographic validation process by Bernstein. ChaCha is a modification of Salsa20 published in 2008. It uses a new round function that increases ...

  6. Activity stream - Wikipedia

    en.wikipedia.org/wiki/Activity_stream

    Activity stream. An activity stream is a list of recent activities performed by an individual, typically on a single website. For example, Facebook 's News Feed is an activity stream. Since the introduction of the News Feed on September 6, 2006, [1] other major websites have introduced similar implementations for their own users.

  7. Glossary of cryptographic keys - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_cryptographic_keys

    training key - (NSA) unclassified key used for instruction and practice exercises. Type 1 key - (NSA) keys used to protect classified information. See Type 1 product. Type 2 key - (NSA) keys used to protect sensitive but unclassified (SBU) information. See Type 2 product. Vernam key - Type of key invented by Gilbert Vernam in 1918. See stream key.

  8. Facebook Watch - Wikipedia

    en.wikipedia.org/wiki/Facebook_Watch

    Facebook Watch (currently rebranding to Facebook Video) is a video on demand service operated by American company Meta Platforms (previously named Facebook, Inc.). The company announced the service in August 2017 and it was available to all U.S. users that month. Facebook Watch's original video content is produced for the company by others, who ...

  9. Advanced Encryption Standard - Wikipedia

    en.wikipedia.org/wiki/Advanced_Encryption_Standard

    Rijndael is a family of ciphers with different key and block sizes. For AES, NIST selected three members of the Rijndael family, each with a block size of 128 bits, but three different key lengths: 128, 192 and 256 bits. AES has been adopted by the U.S. government. It supersedes the Data Encryption Standard (DES), which was published in 1977.

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