Silk - Privacy Pass Client

Name: Silk - Privacy Pass Client
Rating: 2.2965034965034965 (715 reviews)
Author: Cloudflare Research

Client support for Privacy Pass anonymous authorization protocol.

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Silk - Privacy Pass Client is a Chrome extension designed to enhance your online privacy by supporting the Privacy Pass anonymous authorization protocol. It issues unlinkable cryptographic tokens for websites that implement Privacy Pass, such as those protected by Cloudflare. This helps verify your legitimacy as a human user while preserving anonymity and privacy.

When visiting a website that requests a Privacy Pass token, Silk prompts you to complete a challenge. Upon successful completion, the extension obtains a token usable to improve your human signal without revealing your identity. This streamlined process ensures seamless integration with sites that deploy Privacy Pass while maintaining strong privacy protections. Users can refer to the FAQs and Known Issues sections for troubleshooting and detailed guidance.

Extension Privacy & Security Developer Tools

By:

Users:

Rating:

Version:

4.0.2 Last updated: 2024-04-02

Creation date:

2020-04-24

Risk:

Permissions:

declarativeNetRequest
storage
tabs
webRequest

Host permissions:

<all_urls>

Size:

95.00KB

Email:

as*****@cloudflare.com

Full description:

Source:

Chrome Web Store

Data ingested on:

2025-07-11

Ranking

# 847 ▲ 20

Other rankings

#1624 in Accessibility ▲ 4 #7 in privacy keyword 52 ▼ 1 #131 in research keyword 42 ▼ 7

Other platforms

Silk - Privacy Pass Client (v4.0.2)

17,190 3.19

(716)

User reviews

Silk - Privacy Pass Client once helped users avoid repetitive Cloudflare CAPTCHA challenges, making browsing smoother. However, many reviews note that the extension often fails now, causing infinite verification loops, repeated disruptive pop-ups, and crashes. Recent updates appear to have reduced its effectiveness, confusing users and leading to uninstallations. While some users still find it somewhat useful, the consensus is that it currently does not reliably perform its intended function.

Pros

Successfully blocks CAPTCHAs in some cases
Has been helpful and effective for some users in the past
Once worked well and saved user validation effort
Free and easy to install Chrome extension
Some users find it useful for certain browsing scenarios

Cons

Currently often fails to work with Cloudflare challenges, resulting in loops or timeouts
Frequently causes repeated pop-up interruptions, disrupting browsing
Sometimes crashes or becomes greyed out and non-functional
No longer provides passes as effectively as before after recent updates
Unclear or confusing how the extension operates and triggers validation

Recent reviews

Page not found https://pp-attester-turnstile.research.cloudflare.com/ https://pp-attester-turnstile-dev.research.cloudflare.com/

Bu*****, 2025-07-10

Not working anymore

Ma*****, 2025-06-17

This doesn't work with Cloudflare. It comes up, but times out and loops back to the Cloudflare 'verify you are human' doom loop.

Sh*****, 2025-06-11

View all user reviews ›

Extension safety

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Silk - Privacy Pass Client requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood

Risk likelihood measures the probability that a Chrome extension may turn malicious. This is determined by the publisher and the Chrome extension reputation on Chrome Web Store, the amount of time the Chrome extension has been around, and other signals about the Chrome extension. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Chrome extension.

Silk - Privacy Pass Client is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this extension.

Risk likelihood analysis details

Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
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