Signal Overview

Signal Architecture

FingerprintIQ uses 47 total signals split across two collection layers:

• 41 client-side signals — collected by the JavaScript SDK running in the browser
• 6 server-side signals — extracted from the HTTP request at the Cloudflare edge

Each signal has limited entropy on its own. By combining many independent signals, FingerprintIQ achieves a composite fingerprint that is unique across millions of devices, stable across sessions, and resistant to spoofing attempts.

Client Signals (41)

#	Signal	Category	Entropy	Stability
1	Canvas	Rendering	High	Medium
2	WebGL	Hardware	Very High	Very High
3	WebGPU	Hardware	High	Very High
4	Audio	Rendering	High	Medium
5	Fonts	System	High	High
6	WebRTC	Network	Medium	Low
7	WASM Timing	Performance	Medium	Medium
8	Navigator	System	Medium	Very High
9	Media Queries	Preferences	Low	High
10	Screen	Display	Medium	Very High
11	Integrity	Security	Medium	High
12	Wallets	Web3	High	High
13	Storage	Browser	Low	High
14	Math	Engine	Medium	Very High
15	DOMRect	Rendering	Medium	High
16	Headless	Security	High	High
17	Speech Synthesis	System	Very High	High
18	Intl Locale	System	High	Very High
19	Timezone	System	Medium	Very High
20	CSS Computed Style	Engine	High	High
21	JS Error Messages	Engine	High	Very High
22	Worker Scope	Security	Medium	High
23	Resistance	Privacy	Medium	Medium
24	SVG	Rendering	Medium	High
25	Window Features	Engine	Medium	High
26	HTML Element	Engine	Medium	High
27	Media Codecs	System	High	High
28	Status	System	Medium	Medium
29	Platform Features	Hardware	High	Very High
30	UA Client Hints	System	Medium	Very High
31	Capability Vector	Engine	Medium	High
32	Geometry Vector	Rendering	Medium	High
33	Runtime Vector	Engine	Medium	High
34	Sensor Capabilities	Hardware	Low	Very High
35	Behavioral Risk	Security	High	Medium
36	Incognito	Browser	Medium	High
37	DevTools	Security	Medium	Low
38	Virtualization	Security	High	High
39	Rooted / Jailbreak	Security	Medium	High
40	CSS Feature Detection	Engine	Medium	High
41	Frame Depth	Security	Low	High

Server Signals (6)

Signal	Source	Spoof Resistance
TLS Fingerprint	Cloudflare edge	Very High
ASN Classification	IP → ASN lookup	High
Geo Coherence	RTT vs location	High
HTTP Header Order	Request headers	High
UA Consistency	Cross-signal check	Very High
Request Priority	HTTP/2 frames	High

Server-side signals are collected at the Cloudflare edge before the request reaches the Worker. They reflect the client's actual network stack and cannot be modified by browser extensions or JavaScript.

Signal Categories