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  2. Telegram (software) - Wikipedia

    en.wikipedia.org/wiki/Telegram_(software)

    Telegram Web A / Web K: Web: Yes: GPLv3 [193] [194] No: Two web-based versions of Telegram. [195] The web version cannot be used to register and log in, this feature is officially supported by the mobile app only. [196] The code for the legacy web client called Webogram is available as well, though this version is no longer supported. [197]

  3. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  4. End-to-end encryption - Wikipedia

    en.wikipedia.org/wiki/End-to-end_encryption

    End-to-end encryption is intended to prevent data being read or secretly modified, other than by the true sender and recipient (s). The messages are encrypted by the sender but the third party does not have a means to decrypt them, and stores them encrypted. The recipients retrieve the encrypted data and decrypt it themselves.

  5. Worldwide use of telegrams by country - Wikipedia

    en.wikipedia.org/wiki/Worldwide_use_of_telegrams...

    This is a list of telegram services by country. Algérie Poste offers electronic telegram services under the name Barki@tic. Correo Argentino still offers telegram service within Argentina and to international destinations. Post Aruba still offers telegram service. Australia Post closed its telegram service on 7 March 2011.

  6. Threema - Wikipedia

    en.wikipedia.org/wiki/Threema

    Threema is a paid cross-platform encrypted instant messaging app developed by Threema GmbH in Switzerland and launched in 2012. The service operates on a decentralized architecture and offers end-to-end encryption. Users can make voice and video calls, send photos, files, and voice notes, share locations, and make groups.

  7. iTelegram - Wikipedia

    en.wikipedia.org/wiki/ITelegram

    International Telegram or iTelegram provides telegram, telex, and mailgram service. [1] It acquired the Western Union telegram businesses following Western Union's bankruptcy proceedings in 1991. In 2002 it acquired the telegram unit from Canadian company Allstream and renamed it Telegrams Canada. As of 2019, the company maintains telegram ...

  8. Comparison of cross-platform instant messaging clients

    en.wikipedia.org/wiki/Comparison_of_cross...

    Examples of such messaging services include: Skype, Facebook Messenger, Google Hangouts (subsequently Google Chat), Telegram, ICQ, Element, Slack, Discord, etc. Users have more options as usernames or email addresses can be used as user identifiers, besides phone numbers. Unlike the phone-based model, user accounts on a multi-device model are ...

  9. The Open Network - Wikipedia

    en.wikipedia.org/wiki/The_Open_Network

    For access to wallets uses 24 secret words, on the basis of which calculates 256-bit private key of the wallet. The Open Network (previously Telegram Open Network, [1] both abb. as TON) is a decentralized computer network [2] consisting of a layer-1 blockchain with various components. TON was originally developed by Nikolai Durov who is also ...