Apple’s Private Cloud Compute (PCC) delivers powerful computational capabilities for Apple Intelligence while prioritizing groundbreaking privacy and security features. For transparency, the platform is open for inspection by security experts and researchers. Unique to PCC is the Virtual Research Environment (VRE), granting users the ability to analyze security and privacy features firsthand. Additionally, Apple is offering rewards through the Security Bounty program for issues compromising user privacy or security within PCC. By releasing the source code for key components and inviting scrutiny from the research community, Apple strives to bolster trust in the system and enhance its security and privacy measures.
https://security.apple.com/blog/pcc-security-research/