CloudflarePrivacyPass

2017年11月9日 — Privacy Pass leverages an idea from cryptography — zero-knowledge proofs — to let users prove their identity across multiple sites anonymously ...

2019年10月28日 — Privacy Pass, in a nutshell, allows clients to provide proof of trust without revealing where and when the trust was provided. The aim of the ...

2021年10月12日 — The Privacy Pass protocol provides users with a secure way for redeeming tokens. At Cloudflare, we use the protocol to reduce the number of ...

2023年8月31日 — Client support for Privacy Pass anonymous authorization protocol. ... How it works? Privacy Pass Providers: Cloudflare and hCaptcha Get tokens 1.

2023年9月21日 — Privacy Pass is a Chrome and Firefox browser extension that provides a better visitor experience for Cloudflare-protected websites.

這類服務最終目標就是：防止機器或自動化程式，提供更好的安全防護效果。特別是在一些討論區或是需要註冊的服務上經常看到，但明明是真人卻時常跳出上圖的驗證畫面嗎？

2023年10月13日 — Privacy Pass is an emerging standard for preserving user privacy that we are developing in conjunction with Apple, Cloudflare and others.