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Just how private is Apple's Private Cloud Compute? You can test it to find out

The Register · Iain Thomson · last updated

Apple opens Private Cloud Compute to public scrutiny • The Register

Just how private is Apple's Private Cloud Compute? You can test it to find out

Also updates bug bounty program with $1M payout

In June, Apple used its Worldwide Developer Conference to announce the creation of the Private Cloud Compute platform to run its AI Intelligence applications, and now it's asking people to stress test the system for security holes.

Apple has revealed that the platform (PCC) runs on custom-built server hardware and runs a specially hardened operating system derived from the same code base as iOS and macOS. It's also issued a security guide to the system, and pentesters can set up a Virtual Research Environment that investigators can use to examine the platform's strengths and weaknesses.

"In the weeks after we announced Apple Intelligence and PCC, we provided third-party auditors and select security researchers early access to the resources we created to enable this inspection, including the PCC Virtual Research Environment (VRE)," the Apple Security Engineering and Architecture team wrote in a blog post on Thursday.

"Today we’re making these resources publicly available to invite all security and privacy researchers – or anyone with interest and a technical curiosity – to learn more about PCC and perform their own independent verification of our claims."

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Apple is also releasing the full source code for some elements of the PCC, namely:

- The CloudAttestation project used for validation;
- The Thimble project, including the privatecloudcomputed daemon that runs on endpoint devices and uses CloudAttestation.
- The splunkloggingd daemon, which limits the logs that come from a PCC node to avoid security snafus;
- The srd_tools project, which contains the VRE tooling.

To further incentivize white-hat hackers, the fruit cart is also offering serious money for flaws. If you can remotely pull off arbitrary code execution with arbitrary entitlements there's up to a million dollars to be had, with $250,000 if you manage to pull data off a user's device. There are also bounties between $50,000 and $150,000 if you can hack the system from a privileged network position.

"We hope that you'll dive deeper into PCC's design with our Security Guide, explore the code yourself with the Virtual Research Environment, and report any issues you find through Apple Security Bounty," the team declared.

"We believe Private Cloud Compute is the most advanced security architecture ever deployed for cloud AI compute at scale, and we look forward to working with the research community to build trust in the system and make it even more secure and private over time." ®

Related Knowledge Center: Climate economics

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Climate change is now a driver of the world’s economy. The impact is profound:

  • Catastrophic weather events — hurricanes, floods, droughts, high temperatures — are more frequent and more extreme. The cost can be measured in both the initial damage caused and the longer-term impact on the economy.
  • Vulnerable communities are increasing climate-related investments, hardening infrastructure and taking other protective measures.
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  • Governments are making investments and crafting regulations to reduce emissions of carbon dioxide and other greenhouse gases. 

On top of all of this is the cost of uncertainty. As the Fourth National Climate Assessment, released in 2018 by the U.S. Global Change Research Program, says, “The assumption that current and future climate conditions will resemble the recent past is no longer valid.”

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