• 3g Forensics

  • Mobile Phone Detection


    Mobile telephones are an integral part of today's society, however the widespread use of mobile telephones presents an ever increasing problem in security sensitive areas, such as Prisons, Courts, Hospitals and Schools. Interruptions to business meetings and public performances can be annoying to the extent that localised prohibition on the use of mobile are becoming common place. As well as interfering with critical care equipment in medical facilities, aircraft controls and being a fire hazard at petrol stations; mobile telephones are increasingly being used as eavesdropping devices harvesting both audio and visual information by way of their sensitive microphones and built in hi definition cameras.

    Localised restrictions on mobile use are difficult to enforce. Some organisations resort to the illegal activity of jamming the frequencies used by Mobile networks to prevent incoming and outgoing calls. This practice is ill advised, not only is it illegal, but it also precludes the use of a mobile during an emergency situation, leaving the jamming body liable for prosecution on more than one front. Curbing the use of mobile phones in a localised area relies on co-operation from the user and or removal of the device as soon as it is identified as being active. EtherSnort is an invaluable tool for the detection of Mobile phone activity.

    The EtherSnort design is very versatile, applications are wide and varied, however typically With GSM phones getting ever smaller, they are increasingly being used in areas where they may compromise security. GSM and wide band or hopping technologies are becoming the preferred medium for bugs and video surveillance devices.

    EtherSnort can be used to detect detect activity in these areas, alerting the operator by visual means or vibration, providing covert indication of illicit activity.

    For example an LED display can indicate signal strength to assist in location of the source.

    Uses might include

    • Security personnel in Government establishments, military bases, and prisons;
    • commercial applications such as banking, dealing rooms, and design offices;
    • security companies who need to sweep premises for concealed surveillance devices.

    EtherSnort RF Activity Detector utilises an innovative Radio Frequency Detection and Evaluation technology developed by Crownhill Associates Limited. This low cost solution provides reliable detection of RF sources.

    While a spectrum analyser remains the instrument of choice for detecting and identifying RF activity. Spectrum Analysers are expensive bulky and not always readily available. This solution provides RF detection in specific frequency bands using state of the art technology in a small and flexible form factor. Presented as a dedicated product or an OEM module for use in third party solutions.

    Output from EtherSnort can be used to trigger local alarms, remote alarms via ethernet or covert personal alerting via vibration. Based upon a highly selective front end tailored to the band or bands of choice, EtherSnort utilises multistage logarithmic amplifiers to accurately convert radio frequency signals power to an equivalent DC voltage. Full advantage is taken of multi layer chip band pass filters, to provide high attenuation of unwanted signals. The outstanding dynamic range and precision over temperature make the design particularly suitable for harsh environments and situations where false alarms are extremely undesirable.

    Typically EtherSnort would be configured to detect Mobiles Phones 2G&3G, Wide Band Jammers, Unwanted Bluetooth or Wi-Fi Networks, Listening devices and illegal transmissions.

    Potential deployment scenarios exist in:

    • Hospitals
    • Theatres and Cinemas
    • Airports
    • Military Bases
    • High-security areas
    • Examinations (Schools, Universities, etc)
    • Pris

    General Specifications

    • Operation in bands from 50Mhz to 7Ghz with extension to 10Ghz
    • up to 120db dynamic range (60db for near field applications)
    • Detector output via dry contact, DC level, opto, ethernet, audio
    • Low power consumption
    • small footprint