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Website evidence · pilot dataset

Does medium.com fingerprint you?

Inconclusive: the latest scans could not measure this site reliably.

The latest browser setups have no usable measurements. A failed scan is not evidence that fingerprinting is absent. Any earlier imported runs remain available below.

Open evidence JSON ↗

All 7 source records are included in the JSON. 2 older runs have no recorded timestamp; missing provenance stays unknown. The tabs show the latest usable homepage measurement for each setup. Later failed attempts remain in the history. Scan scope and methodology ↗

Inside the scan

← All websites

Visitor setup

Unmeasured

Unmeasured

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Unmeasured · Partial load
Page context
Challenge page
Scan time
2026-10-22T15:08:03.390993Z
Browser / scanner
156.0.8078.4 / 0.4
Unmeasured — no usable scan result

Only a challenge page was measured; the normal page remains unmeasured.

Source record and integrity
Original source
results/headful/medium-com-20261022T150803.json
Original file SHA-256
1af8037762dcb617b23fc5ccf56644f6e8b69411258380339986b8bc174dd556

Run ID: headful-1af8037762dc. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (3)

Visitor setup

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured
Page context
Challenge page
Scan time
Not recorded
Browser / scanner
Unknown browser / Unversioned

Captured titleAttention Required! | Cloudflare

CanvasDraws text and reads canvas output.1 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls
  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.1 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent4 calls
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 237
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 269
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20335
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20372
Providers, script signatures, and DNS 0 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

No provider or DNS evidence in this record.

Network and worker observations 6 requests
Captured scripts
1
Instrumented frames
Not recorded
Google Ads observed
No
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • static.cloudflareinsights.com
Source record and integrity
Original source
results/headful/medium-com.json
Original file SHA-256
8a0ef4665eb0f77a3e8c97067512abaff4a08175c3c0e5e1beff655b3acb1edc

Run ID: headful-8a0ef4665eb0. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured
Page context
Challenge page
Scan time
2026-10-19T06:05:54.553450Z
Browser / scanner
156.0.8078.4 / 0.3

Captured titleAttention Required! | Cloudflare

CanvasDraws text and reads canvas output.1 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls

Frame: https://medium.com/

  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.1 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent4 calls

Frame: https://medium.com/

  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 237
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 269
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20335
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20372
Providers, script signatures, and DNS 0 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

No provider or DNS evidence in this record.

Network and worker observations 6 requests
Captured scripts
1
Instrumented frames
1
Google Ads observed
No
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • static.cloudflareinsights.com
Source record and integrity
Original source
results/headful/medium-com-20261019T060554.json
Original file SHA-256
f346d7554b65bcfd708bd50026dbeb9fecfd252b2c3accd53a5c6dae928ffd1c

Run ID: headful-f346d7554b65. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-22T15:08:02.733953Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headful/medium-com-20261022T150802.json
Original file SHA-256
945bca6cc6978810e8c1edc231b52c09cee4f79e07f9b32afff81f14355a7565

Run ID: headful-945bca6cc697. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Unmeasured

Unmeasured

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Unmeasured
Page context
Challenge page
Scan time
2026-10-22T18:28:50.210819Z
Browser / scanner
156.0.8078.4 / 0.4
Unmeasured — no usable scan result

Only a challenge page was measured; the normal page remains unmeasured.

Source record and integrity
Original source
results/headless/medium-com-20261022T182850.json
Original file SHA-256
8cea485aa14d0898f6f86c0132d8f997633e27c54595415ea0c4e9987ae0875e

Run ID: research-8cea485aa14d. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (2)

Research setup

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured
Page context
Challenge page
Scan time
Not recorded
Browser / scanner
Unknown browser / Unversioned

Captured titleAttention Required! | Cloudflare

CanvasDraws text and reads canvas output.1 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls
  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.1 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent4 calls
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 237
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 269
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20335
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20372
Providers, script signatures, and DNS 0 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

No provider or DNS evidence in this record.

Network and worker observations 6 requests
Captured scripts
0
Instrumented frames
Not recorded
Google Ads observed
No
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • static.cloudflareinsights.com
Source record and integrity
Original source
results/headless/medium-com.json
Original file SHA-256
3edfb837f985264def0597810a6693e964dc4856027dec24a6d9b884eee3ae2f

The research mode is inferred from the archive folder because this legacy record has no mode field.

Run ID: research-3edfb837f985. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured
Page context
Challenge page
Scan time
2026-10-19T05:51:26.007620Z
Browser / scanner
156.0.8078.4 / 0.3

Captured titleAttention Required! | Cloudflare

CanvasDraws text and reads canvas output.1 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls

Frame: https://medium.com/

  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.1 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent4 calls

Frame: https://medium.com/

  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 237
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 269
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20335
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20372
Providers, script signatures, and DNS 0 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

No provider or DNS evidence in this record.

Network and worker observations 6 requests
Captured scripts
1
Instrumented frames
1
Google Ads observed
No
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • static.cloudflareinsights.com
Source record and integrity
Original source
results/headless/medium-com-20261019T055126.json
Original file SHA-256
13a48dcc56948e3342e39a15c8e6514d57cee913b273a93ef06de04408b7de51

Run ID: research-13a48dcc5694. The JSON contains sanitized observations, not the original private scan payload.

Queries, request bodies, cookies, extracted values, raw errors, and session payloads are excluded before publication. The source digest identifies the original private record.

Read the sanitized JSON →