Browse Definitions:
Definition

canvas fingerprinting (CPF)

Contributor(s): Matthew Haughn

Canvas fingerprinting (CPF) is a surreptitious online user tracking technique that relies on minute differences in text or images drawn on command by users’ browsers.

Canvas fingerprinting relies on standard HTML5 and JavaScript, using a website canvas feature that one might draw on or use to display graphs and charts. On some sites, this is a visible and usable canvas. Sites that use canvas fingerprinting, however, use a hidden canvas. Commands to your graphics processing unit (GPU) cause it to draw a string of text as a pixel-based image that is almost perfectly unique and individually identifying. Even completely identical hardware systems are almost always individualized through variables such as different browsers, driver versions, font settings and text smoothing settings such as anti-aliasing.

ProPublica, an independent newsroom, claims that five percent of the top 100,000 websites use canvas fingerprinting and of those, 95 percent use AddThis.com’s product. Examples of sites using canvas fingerprinting include United States and Canadian government sites, POF.com and many others.

Methods of avoiding canvas fingerprinting include using TOR and Chameleon browsers, Adblock plus, Noscript browser extension, DoNotTrackMe and just turning off JavaScript. The unfortunate aspect of most of these solutions is that they may change ones browsing experience.

This was last updated in July 2014

Continue Reading About canvas fingerprinting (CPF)

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • PCAOB (Public Company Accounting Oversight Board)

    The Public Company Accounting Oversight Board (PCAOB) is a Congressionally-established nonprofit that assesses audits of public ...

  • cyborg anthropologist

    A cyborg anthropologist is an individual who studies the interaction between humans and technology, observing how technology can ...

  • RegTech

    RegTech, or regulatory technology, is a term used to describe technology that is used to help streamline the process of ...

SearchSecurity

  • spear phishing

    Spear phishing is an email-spoofing attack that targets a specific organization or individual, seeking unauthorized access to ...

  • supercookie

    A supercookie is a type of tracking cookie inserted into an HTTP header by an internet service provider to collect data about a ...

  • email spam

    Email spam, or junk email, is unsolicited bulk messages sent through email with commercial, fraudulent or malicious intent.

SearchHealthIT

SearchDisasterRecovery

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

  • mass notification system (MNS)

    A mass notification system is a platform that sends one-way messages to inform employees and the public of an emergency.

  • disaster recovery as a service (DRaaS)

    One approach to a strong disaster recovery plan is DRaaS, where companies offload data replication and restoration ...

SearchStorage

  • GlusterFS (Gluster File System)

    GlusterFS (Gluster File System) is an open source distributed file system that can scale out in building-block fashion to store ...

  • virtual memory

    Virtual memory is a memory management capability of an OS that allows a computer to compensate for physical memory shortages by ...

  • yottabyte (YB)

    A yottabyte is a measure of theoretical storage capacity and is 2 to the 80th power bytes, or, in decimal, approximately 1,000 ...

SearchSolidStateStorage

  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

  • SSD caching

    SSD caching, also known as flash caching, is the temporary storage of data on NAND flash memory chips in a solid-state drive so ...

  • NVDIMM (Non-Volatile Dual In-line Memory Module)

    An NVDIMM (non-volatile dual in-line memory module) is hybrid computer memory that retains data during a service outage.

SearchCloudStorage

  • RESTful API

    A RESTful application program interface breaks down a transaction to create a series of small modules, each of which addresses an...

  • cloud storage infrastructure

    Cloud storage infrastructure is the hardware and software framework that supports the computing requirements of a private or ...

  • Zadara VPSA and ZIOS

    Zadara Storage provides block, file or object storage with varying levels of compute and capacity through its ZIOS and VPSA ...

Close