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  2. Rugged smartphone - Wikipedia

    en.wikipedia.org/wiki/Rugged_smartphone

    Rugged smartphone. A rugged smartphone is a specific type of toughened smartphone which is designed to be completely sealed within a durable housing to protect it against damage from water, shock, dust, and vibration.

  3. STU-III - Wikipedia

    en.wikipedia.org/wiki/STU-III

    STU-III (Secure Telephone Unit - third generation) is a family of secure telephones introduced in 1987 by the NSA for use by the United States government, its contractors, and its allies. STU-III desk units look much like typical office telephones, plug into a standard telephone wall jack and can make calls to any ordinary phone user (with such ...

  4. Secure telephone - Wikipedia

    en.wikipedia.org/wiki/Secure_telephone

    A Secure Terminal Equipment desk set. A secure telephone is a telephone that provides voice security in the form of end-to-end encryption for the telephone call, and in some cases also the mutual authentication of the call parties, protecting them against a man-in-the-middle attack.

  5. Librem 5 - Wikipedia

    en.wikipedia.org/wiki/Librem_5

    The Librem 5 is the first phone to contain a smartcard reader, in which an OpenPGP card can be inserted for secure cryptographic operations. [14] Purism plans to use OpenPGP cards to implement storage of GPG keys, disk unlocking, secure authentication, a local password vault, protection of sensitive files, user persons, and travel persons. [36]

  6. Fishbowl (secure phone) - Wikipedia

    en.wikipedia.org/wiki/Fishbowl_(secure_phone)

    Fishbowl is a mobile phone architecture developed by the U.S. National Security Agency (NSA) to provide a secure Voice over IP (VoIP) capability using commercial grade products that can be approved to communicate classified information. It is the first phase of NSA's Enterprise Mobility Architecture.

  7. Best Phones for Hard of Hearing Users - AOL

    www.aol.com/best-phones-hard-hearing-users...

    Ahead are the best phones for people who are hard of hearing. Get the full scoop on cell phones, amplified devices, and caption phones that are all designed to make communicating easier and simpler.

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