How to identify unique devices using javascript? – Stack …
You can use the fingerprintJS2 library for your project too.
How this library gets fingerprints
collects all the unique features from a device/browser passing them through a hash function to provide a unique identifier.
Example
There are many other ways to get unique browser fingerprint.
The newest method to obtain browser information is called “Canvas Fingerprinting. ” Simply put, websites are written in HTML5 code, and inside that code, there is a little piece of code that takes your browser’s fingerprint.
So, how are websites doing that, exactly? Let me explain.
This new tracking method that websites employ to obtain your browser fingerprint is enabled by new coding features in HTML5.
HTML5 is the coding language used to build websites. It’s the core fundamentals of every website. Within the HTML5 coding language, there’s an element which is called “canvas. ”
Originally, the HTML element was used to draw graphics on a web page.
Wikipedia provides the following explanation on how exploiting the HTML5 canvas element generates browser fingerprinting:
“When a user visits a page, the fingerprinting script first draws text with the font and size of its choice and adds background colors. Next, the script calls Canvas API’s ToDataURL method to get the canvas pixel data in dataURL format, which is basically a Base64 encoded representation of the binary pixel data. Finally, the script takes the hash of the text-encoded pixel data, which serves as the fingerprint. ”
In plain English, what this means is that the HTML5 canvas element generates certain data, such as the font size and active background color settings of the visitor’s browser, on a website. This information serves as the unique fingerprint of every visitor.
In contrast to how cookies work, canvas fingerprinting doesn’t load anything onto your computer, so you won’t be able to delete any data, since it’s not stored on your computer or device, but elsewhere.
Source and further reading:
By the way you can get much more information from Googling yourself.
FingerprintJS – GitHub
FingerprintJS is a browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them. Unlike cookies and local storage, a fingerprint stays the same in incognito/private mode and even when browser data is purged.
View Our Demo.
Quick start
Install from CDN
Run this code
Alternatively you can install from NPM to use with Webpack/Rollup/Browserify
npm i @fingerprintjs/fingerprintjs
# or
yarn add @fingerprintjs/fingerprintjs
import FingerprintJS from ‘@fingerprintjs/fingerprintjs’
// Initialize an agent at application startup.
const fpPromise = ();(async () => {
const fp = await fpPromise
const result = await ()
(visitorId)})()
Full documentation
Upgrade to Pro version to get 99. 5% identification accuracy
FingerprintJS Pro is a professional visitor identification service that processes all information server-side and transmits it securely to your servers using server-to-server APIs.
Pro combines browser fingerprinting with vast amounts of auxiliary data (IP addresses, time of visit patterns, URL changes and more) to be able to reliably deduplicate different users that have identical devices, resulting in 99. 5% identification accuracy.
You can try Pro without usage limits for 10 days – no credit card required.
Full product comparison:
Open Source
Pro
Core Features
100% Open-sourceyesno1
Standard fingerprint signalsscreen, os, device name✓✓
Advanced fingerprint signalscanvas, audio, fonts✓✓
ID typefingerprintvisitorID2
ID lifetimeseveral weeksmonths/years
ID originclientserver
ID collisionscommonrare
Additional Features
Incognito mode detectionworks in all modern browsers – see our full list of browsers supported–✓
Server-side accuracy increasebased on additional server-side signals, such as TLS crypto support, ipv4/v6 data and others–✓
Query API & realtime Webhooksbuild flexible workflows–✓
Geolocationbased on IP address–✓
Operations
Data securityYour infrastructureEncrypted at rest
StorageYour infrastructureUnlimited up to 1 yr
RegionsYour infrastructureHosting in US and EU
ComplianceYour infrastructureGDPR, CCPA compliant3
SLANo SLA99. 9% Uptime
SupportGitHub communitySupport team via email, chat, and call-back within 1 business day
1. Pro uses the open source fingerprinting library as well as proprietary technology for increased accuracy and identifier stability.
2. VisitorIDs, in comparison to fingerprints, include server side techniques, are deduplicated and utilize fuzzy matching to result in a more accurate and stable identifier. Fingerprint hashes rely on an exact match across all browser attributes, making them less stable across > 4 week time intervals.
3. FingerprintJS Pro is GDPR and CCPA compliant as the data processor. You still need to be compliant as the data controller and use the identification for fraud under legitimate interest or ask for user consent.
Pro result example:
{
“requestId”: “HFMlljrzKEiZmhUNDx7Z”,
“visitorId”: “kHqPGWS1Mj18sZFsP8Wl”,
“visitorFound”: true,
“confidence”: { “score”: 0. 995},
“incognito”: false,
“browserName”: “Chrome”,
“browserVersion”: “92. 0. 4515. 107”,
“os”: “Mac OS X”,
“osVersion”: “10. 15. 6”,
“device”: “Other”,
“ip”: “192. 65. 67. 131”,
“ipLocation”: {
“accuracyRadius”: 100,
“latitude”: 37. 409657,
“longitude”: -121. 965467
//… }}
Live demo
⏱ How to upgrade from Open Source to Pro in 30 seconds
FingerprintJS Pro documentation
▶️ Video: use FingerprintJS Pro to prevent multiple signups
Migrating from v2
Migration guide
V2 documentation
Version policy
See the compatibility policy for the API and visitor identifiers in the version policy guide.
Browser support
The library supports all popular browsers.
See more details and learn how to run the library in old browsers in the browser support guide.
Contributing
See the contributing guidelines to learn how to start a playground, test and build.
Useful links
Easy to use bot detection in JS, new FingerprintJS project
What is Canvas Fingerprinting and how the companies use it to track …
Recently Mozilla planned to display permission prompts if a website attempt to use HTML5 Canvas Image Data in the Firefox web browser: in fact, this HTML5 element is often used to tracking users with a technique called “Canvas Fingerprinting”
What is “Canvas Fingerprinting”?
Canvas fingerprinting is a type of “browser fingerprinting” techniques of tracking online users that allow websites to uniquely identify and track visitors using HTML5 canvas element instead of browser cookies or other similar means.
A “fingerprint” is primarily based on browser, operating system, and installed graphics hardware, so not sufficient to uniquely identify users by itself: therefore, this fingerprint could be combined with other sources of entropy to provide a unique identifier.
Canvas fingerprinting works by exploiting the HTML5 canvas element: when a user visits a website their browser is instructed to “draw” a hidden line of text or 3D graphic that is then rendered into a single digital token, a potentially unique identifier to track users without any actual identifier persistence on the machine.
Variations on installed GPU model, operating system and overall system performances cause the variations in the rendered digital token.
Generated token can be stored and shared with advertising partners to identify users when they visit affiliated website and can be used to create a profile in order to customize the advertising.
The fingerprinting technology emerged about two years ago: the site Browserleaks has created a fingerprinting demonstration that you can run in your browser, provided that it supports HTML5 Canvas and that JavaScript is enabled on the site.
For more technical information about this technique, you can read this paper by Keaton Mowery and Hovav Shacham: Pixel Perfect: Fingerprinting Canvas in HTML5
We have demonstrated that the behavior of
Frequently Asked Questions about fingerprint javascript
WHAT IS fingerprint in JavaScript?
Fingerprint. js collects all the unique features from a device/browser passing them through a hash function to provide a unique identifier. Example. There are many other ways to get unique browser fingerprint.Jul 28, 2019
What is fingerprintjs2?
FingerprintJS is a browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them. Unlike cookies and local storage, a fingerprint stays the same in incognito/private mode and even when browser data is purged.
How do you use fingerprinting on canvas?
Canvas fingerprinting works by exploiting the HTML5 canvas element: when a user visits a website their browser is instructed to “draw” a hidden line of text or 3D graphic that is then rendered into a single digital token, a potentially unique identifier to track users without any actual identifier persistence on the …Nov 6, 2017
