How does iCloud Private Relay work? Apple partner Cloudflare explains

With last year’s iOS 15 and macOS Monterey 12, Apple added a new iCloud Private Relay feature to help protect your internet privacy. This feature sends all your internet requests through two independent and secure internet relays, one operated by Apple and one operated by a third party.

Network infrastructure company Cloudflare, one of the partners Apple works with, has published a new blog post detailing its role in the iCloud Private Relay process.

How iCloud Private Relay Works

In a blog post published on Wednesday, Cloudflare explained how iCloud Private Relay works, its role in the process, and how network administrators can What measures are taken to ensure a seamless user experience. Here's the background to iCloud Private Relay:

The iCloud Private Relay system is designed to ensure that no party processing user data has complete information about who the user is and what they are trying to access.

To do this, Private Relay uses modern encryption and transport mechanisms to relay traffic from user devices through Apple and partner infrastructure before sending the traffic to the target website.

Cloudflare is one of Apple’s partners for “second relay” in this process. The company explains that Cloudflare is "ideally suited" to the task because it "operates one of the largest and fastest networks in the world."

We also specialize in building and using modern encryption and transport protocols, including TLS 1.3 and QUIC. QUIC and the closely related MASQUE are technologies that enable private relays to efficiently move data between multiple relay hops without incurring a loss in performance.

The same building blocks that power Cloudflare products were used to build support for Private Relay: our network, 1.1.1.1, Cloudflare Workers and software like quiche, our open source QUIC (now MASQUE) protocol handling The library now includes proxy support.

Cloudflare also detailed that it is crucial that iCloud Private Relay does not impact the user experience when it comes to web browsing speeds. In fact, its tests show that using iCloud Private Relay can "significantly reduce page load times." This means "increased privacy does not come at the expense of performance."

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