Browse Definitions :
Definition

frequency jammer

Contributor(s): Matthew Haughn

Frequency jamming is the disruption of radio signals through use of an over-powered signal in the same frequency range.

When most people think of frequency jamming, what comes to mind are radio, radar and cell phone jamming. However, any communication that uses radio frequencies can be jammed by a strong radio signal in the same frequency. In this manner, Wi-Fi may be attacked with a network jamming attack, reducing signal quality until it becomes unusable or disconnects occur. With very similar methods, a focused and aimed signal can actually break access point hardware, as with equipment destruction attacks.

Frequency jamming can be benign or malicious. Police and the military often use jamming devices to limit or disrupt communications during hostage situations, bomb threats or when military action is underway. Less benignly, jammers have also been used to disrupt First Amendment rights in peaceful protests.

Portable personal jammers are available to enable their owners to prevent others in their immediate vicinity (up to 60-80 feet away) from using cell phones. Similar equipment is manufactured to block signals in environments where Wi-Fi and cell phone and activity may not be desirable, such as theaters, churches, secure sever rooms and operating rooms.

There are ways to detect and help prevent these kinds of attacks. Wireless intrusion prevention systems (WIPS) monitor the radio spectrum 24/7, making a signal jammer apparent. Some radio-based devices support spread spectrum modulation so that hardware can cycle though different frequencies to make the devices harder to jam. In the case of outside of premises attacks, the use of paint with copper flakes can stop the signals from penetrating walls as a passive and permanent protection. For complete protection, a Faraday cage will stop any wireless signal from penetrating.

Commercial jamming devices are available, as are guides on how to make such devices. As this type of equipment violates FCC regulations, frequency jammers cannot legally be sold, built or used within the United States.

This was last updated in July 2014

Continue Reading About frequency jammer

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • regulatory compliance

    Regulatory compliance is an organization's adherence to laws, regulations, guidelines and specifications relevant to its business...

  • privacy compliance

    Privacy compliance is a company's accordance with established personal information protection guidelines, specifications or ...

  • data governance policy

    A data governance policy is a documented set of guidelines for ensuring that an organization's data and information assets are ...

SearchSecurity

  • asymmetric cryptography (public key cryptography)

    Asymmetric cryptography, also known as public-key cryptography, is a process that uses a pair of related keys -- one public key ...

  • Evil Corp

    Evil Corp is an international cybercrime network that uses malicious software to steal money from its victims' bank accounts.

  • Plundervolt

    Plundervolt is a method of hacking that involves depriving an Intel chip of power so that processing errors occur.

SearchHealthIT

  • telemedicine (telehealth)

    Telemedicine is the remote delivery of healthcare services, such as health assessments or consultations, over the ...

  • Project Nightingale

    Project Nightingale is a controversial partnership between Google and Ascension, the second largest health system in the United ...

  • medical practice management (MPM) software

    Medical practice management (MPM) software is a collection of computerized services used by healthcare professionals and ...

SearchDisasterRecovery

SearchStorage

  • M.2 SSD

    An M.2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification written for internally mounted storage...

  • RAID (redundant array of independent disks)

    RAID (redundant array of independent disks) is a way of storing the same data in different places on multiple hard disks or ...

  • cache memory

    Cache memory, also called CPU memory, is high-speed static random access memory (SRAM) that a computer microprocessor can access ...

Close