xPeek: Digital Cinema Distribution

The Problem

Digital Cinema Packages (DCP) rely on AES-128 encryption with RSA-2048 Key Delivery Messages (KDM). One key per content element. One compromised KDM exposes the entire film. The HDCP master key leaked in 2010 and has never been revoked.

The DCP standard was designed in 2005 and has not fundamentally changed. Every theater receives the same content encrypted with a single key. Key management is centralized — a breach at the KDM distribution point compromises every theater's copy simultaneously.

The Narrowbeer replay attack (USENIX 2025) demonstrated that even the transport layer is vulnerable. PlayReady SL3000 certificates leaked in 2025, undermining the entire trust chain. The cinema industry needs a distribution model where no single point of failure exposes content.

The Old Way

The PRIVATE.ME Solution

xPeek replaces single-key DCP distribution with XorIDA threshold shares delivered through independent channels. Theater playback requires combining shares from a threshold quorum — no single intercepted package contains viewable content.

Content is split into shares distributed via satellite, fiber, and physical media. Each delivery channel carries a share that is mathematically indistinguishable from random data. Playback reconstruction happens inside the theater's secure media block, requiring threshold shares plus time-locked authorization.

Unlike DCP's reliance on AES-128 computational security, xPeek provides information-theoretic protection. There is no key to steal, no encryption to break. The security guarantee is mathematical: k-1 shares reveal exactly zero bits of the original content, regardless of computational power.

The New Way

How It Works

xPeek integrates XorIDA threshold splitting into cinema distribution with per-reel HMAC integrity, multi-channel delivery, and time-locked theater reconstruction.

Use Cases

Integration

import { splitDCP, authorizePlayback } from '@private.me/xpeek';

// Split feature film for 3-channel distribution
const shares = await splitDCP({
  content: dcpBuffer,
  threshold: { k: 2, n: 3 },
  channels: ['satellite', 'fiber', 'physical'],
  playWindow: { start: '2026-06-01', end: '2026-09-01' }
});
// Authorize theater playback within time window
await authorizePlayback(theaterId, shares, { requireXlock: true });

Security Properties

Verifiable Data Protection

Every operation in this ACI produces a verifiable audit trail via xProve. HMAC-chained integrity proofs let auditors confirm that data was split, stored, and reconstructed correctly — without accessing the data itself.

Ready to deploy xPeek?

Talk to Ren, our AI sales engineer, or book a live demo with our team.

Ship Proofs, Not Source

xPeek generates cryptographic proofs of correct execution without exposing proprietary algorithms. Verify integrity using zero-knowledge proofs — no source code required.

Use Cases