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2. Stingray phone tracker - Wikipedia

   en.wikipedia.org/wiki/Stingray_phone_tracker

   The StingRay does this by way of the following man-in-the-middle attack: (1) simulate a cell site and force a connection from the target device, (2) download the target device's IMSI and other identifying information, (3) conduct "GSM Active Key Extraction" [31] to obtain the target device's stored encryption key, (4) use the downloaded ...

3. GrapheneOS - Wikipedia

   en.wikipedia.org/wiki/GrapheneOS

   They concluded GrapheneOS cannot change how "Android devices become garbage after three years at the latest", but "it can better secure the devices during their remaining life while protecting privacy." [6] In June 2021, reviews of GrapheneOS, KaiOS, AliOS, and Tizen OS, were published in Cellular News. The review of GrapheneOS called it ...

4. Automatic identification system - Wikipedia

   en.wikipedia.org/wiki/Automatic_identification...

   The device is designed for periodic use and only in emergencies due to its PATDMA-type operation which places stress on the slot map. Specialist AIS transceivers Despite there being IMO/IEC published AIS specifications, a number of authorities have permitted and encouraged the development of hybrid AIS devices.

5. SMS - Wikipedia

   en.wikipedia.org/wiki/SMS

   The only sure way of detecting and blocking spoofed messages is to screen incoming mobile-originated messages to verify that the sender is a valid subscriber and that the message is coming from a valid and correct location.

6. Instant messaging - Wikipedia

   en.wikipedia.org/wiki/Instant_messaging

   Instant messaging (IM), sometimes also called "messaging" or "texting", consists of computer-based human communication between two users (private messaging) or more (chat room or "group") in real-time, allowing immediate receipt of acknowledgment or reply.

7. Key (cryptography) - Wikipedia

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

   However, the password may be the only secret data that is accessible to the cryptographic algorithm for information security in some applications such as securing information in storage devices. Thus, a deterministic algorithm called a key derivation function (KDF) uses a password to generate the secure cryptographic keying material to ...

8. Line (software) - Wikipedia

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

   Users can see a real-time confirmation when messages are sent and received or use a hidden chat feature, which can hide and delete a chat history (from both involved devices and Line servers) after a time set by the user. [51] The application also makes free voice and video calls.

9. Telegraphy - Wikipedia

   en.wikipedia.org/wiki/Telegraphy

   A telegraph is a device for transmitting and receiving messages over long distances, i.e., for telegraphy. The word telegraph alone generally refers to an electrical telegraph. Wireless telegraphy is transmission of messages over radio with telegraphic codes.