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  2. Stingray phone tracker - Wikipedia

    en.wikipedia.org/wiki/Stingray_phone_tracker

    A StingRay can be used to identify and track a phone or other compatible cellular data device even while the device is not engaged in a call or accessing data services. [25] A Stingray closely resembles a portable cellphone tower. Typically, law enforcement officials place the Stingray in their vehicle with a compatible computer software.

  3. Cellphone surveillance - Wikipedia

    en.wikipedia.org/wiki/Cellphone_surveillance

    The Fremont Police Department's use of a StingRay device is in a partnership with the Oakland Police Department and Alameda County District Attorney's Office. [1] End-to-end encryption such as Signal protects message and call traffic against StingRay devices using cryptographic strategies. [6] A typical cell tower mounted on electric lines.

  4. IMSI-catcher - Wikipedia

    en.wikipedia.org/wiki/IMSI-catcher

    In most cases, the operation cannot be recognized immediately by the subscriber. But there are a few mobile phones that show a small symbol on the display, e.g. an exclamation point, if encryption is not used. This "Ciphering Indication Feature" can be suppressed by the network provider, however, by setting the OFM bit in EF AD on the SIM card ...

  5. PeerBlock - Wikipedia

    en.wikipedia.org/wiki/PeerBlock

    PeerBlock is the Windows successor to the software PeerGuardian (which is currently maintained only for Linux). [3] It blocks incoming and outgoing connections to IP addresses that are included on blacklists (made available on the Internet), and to addresses specified by the user. [3] PeerBlock mainly uses blacklists provided by iblocklist.com. [4]

  6. Stingray use in United States law enforcement - Wikipedia

    en.wikipedia.org/wiki/Stingray_use_in_United...

    Ellis that the use of a stingray constituted a search that requires a warrant, but did not suppress the evidence based on exigent circumstances and good faith exception. [30] On September 21, 2017, the D.C. Court of Appeals ruled in Prince Jones v. United States that using a stingray requires a warrant. [31] [32] [33]

  7. 2 GB limit - Wikipedia

    en.wikipedia.org/wiki/2_GB_limit

    The 2 GB limit refers to a physical memory barrier for a process running on a 32-bit operating system, which can only use a maximum of 2 GB of memory. [1] The problem mainly affects 32-bit versions of operating systems like Microsoft Windows and Linux, although some variants of the latter can overcome this barrier. [2]

  8. A5/1 - Wikipedia

    en.wikipedia.org/wiki/A5/1

    A5/1 is initialised using a 64-bit key together with a publicly known 22-bit frame number. Older fielded GSM implementations using Comp128v1 for key generation, had 10 of the key bits fixed at zero, resulting in an effective key length of 54 bits. This weakness was rectified with the introduction of Comp128v3 which yields proper 64 bits keys.

  9. 8b/10b encoding - Wikipedia

    en.wikipedia.org/wiki/8b/10b_encoding

    The low five bits of data are encoded into a 6-bit group (the 5b/6b portion) and the top three bits are encoded into a 4-bit group (the 3b/4b portion). These code groups are concatenated together to form the 10-bit symbol that is transmitted on the wire. The data symbols are often referred to as D.x.y where x ranges over 0–31 and y over 0–7.