289 lines
13 KiB
HTML
289 lines
13 KiB
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<span class="sep">/</span>
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<span class="sep">/</span>
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<span>Privacy Policy</span>
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<article class="doc-content">
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<h1>ChronoSeal Privacy Policy</h1>
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<p class="doc-subtitle">ChronoSeal is a privacy-oriented browser attestation system. It is designed to validate short-lived session continuity without creating persistent user profiles.</p>
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<hr>
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<p>This document describes what ChronoSeal itself collects and stores. Applications that integrate ChronoSeal may collect additional data under their own policies.</p>
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<h2>Data ChronoSeal Processes</h2>
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<p>ChronoSeal processes only the minimum protocol parameters needed to validate a live browser session. We collect no personal data, identifiers, or tracking tokens.</p>
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<table>
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<thead>
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<tr>
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<th>Data Parameter</th>
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<th>Core Purpose</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code>session_id</code></td>
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<td>Opaque session lookup key. Generated randomly, unrelated to user identity.</td>
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</tr>
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<tr>
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<td>Public Key</td>
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<td>Required to verify signed heartbeats for the specific session.</td>
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</tr>
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<tr>
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<td><code>salt</code></td>
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<td>Rotated material used for secure hash-chain progression.</td>
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</tr>
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<tr>
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<td><code>initial_hash</code> / <code>prev_hash</code></td>
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<td>Provides replay-resistant cryptographic continuity.</td>
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</tr>
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<tr>
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<td>Timestamp</td>
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<td>Enforces drift bounds and liveness thresholds.</td>
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</tr>
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<tr>
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<td>Mouse Event Samples</td>
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<td>Lightweight validation of input activity plausibility.</td>
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</tr>
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<tr>
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<td>VM Stack State</td>
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<td>Verifies correct execution of the randomized math program.</td>
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</tr>
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<tr>
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<td>Fingerprint Fields</td>
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<td>Sanity validation (Screen aspect ratio, device pixel ratio, concurrency CPU count).</td>
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</tr>
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<tr>
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<td>Gene Commitment</td>
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<td>Verifies client execution of server-issued synthetic gene mutations.</td>
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</tr>
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<tr>
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<td>Expiration Time</td>
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<td>Manages session lifecycle and garbage-collection checks.</td>
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</tr>
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</tbody>
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</table>
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<h2>Data ChronoSeal Does Not Collect</h2>
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<p>ChronoSeal is built on the principle of data minimization. It does <strong>not</strong> collect, process, or build databases of:</p>
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<ul>
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<li>Personal information (names, emails, logins, accounts).</li>
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<li>Browser history or page navigation tracks.</li>
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<li>IP address history or device fingerprints across multiple sessions.</li>
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<li>Location history or geological coordinate lookups.</li>
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<li>Cross-site tracking identifiers or cookie graphs.</li>
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</ul>
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<h2>Session Lifetime & Expiration</h2>
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<p>Sessions are short-lived. By default, they expire after <strong>30 minutes</strong> (configurable via <code>expiration_minutes</code>). Expired sessions are continuously purged from memory and storage by background cleanup workers. If the daemon runs in-memory, all session history is immediately lost when the process exits.</p>
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<h2>Storage Modes & Persistence</h2>
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<p>Storage is fully configured by the operator and supports the following modes:</p>
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<ul>
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<li><strong>sqlite-in-memory:</strong> Default mode. Process memory only, completely ephemeral.</li>
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<li><strong>sqlite-in-disk:</strong> Persisted to local SQLite file for recovery across restarts.</li>
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<li><strong>valkey:</strong> Distributed storage, persisted according to Valkey deployment settings.</li>
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</ul>
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<h2>Client-Side Cryptographic Key Custody</h2>
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<p>The browser WASM runtime generates an Ed25519 keypair locally when the session starts.</p>
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<ul>
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<li>The <strong>public key</strong> is transmitted to the server during the <code>/init</code> handshake.</li>
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<li>The <strong>private key</strong> is retained in browser WASM memory and is <strong>never transmitted</strong> over the network.</li>
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<li>Heartbeat payloads are signed locally in the browser before submission.</li>
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</ul>
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<p>This provides strong session continuity without creating long-term tracking identifiers.</p>
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<strong>Silent Rejection:</strong> To minimize feedback for attackers, ChronoSeal returns identical success responses <code>{"status":"ok"}</code> for accepted and rejected heartbeat requests, omitting next-state fields on rejection.
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<div class="doc-pager-title">Design Philosophy</div>
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<div class="doc-pager-title">Security Policy</div>
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Last Updated: June 2026 (v1.0.2)
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<img class="logobar" src="assets/logo.svg" alt="ChronoSeal Logo" style="width: 24px; height: 24px; vertical-align: middle;"> ChronoSeal
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<p>Next-generation browser attestation daemon built for the modern web.</p>
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<p>© 2026 ChronoSeal Project. Built with 🦀 Rust and ❤️ for open source.</p>
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