t1385.12+13: Add privacy-comparison.md and cross-reference updates#2776
t1385.12+13: Add privacy-comparison.md and cross-reference updates#2776alex-solovyev merged 2 commits intomainfrom
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…ations (t1385.12) Add comprehensive privacy-comparison.md covering all 15 supported chat platforms (SimpleX, Signal, Matrix, Telegram, WhatsApp, iMessage, Nostr, Slack, Discord, Google Chat, MS Teams, Nextcloud Talk, Urbit, XMTP, Bitchat) with matrices for: encryption, metadata collection, identity requirements, AI training policies, open source status, self-hosting, push notification privacy, runner dispatch suitability, and Matterbridge bridging support. Includes threat model recommendations and privacy ranking. Updates opsec.md with cross-reference and expanded platform trust table. Closes #2759
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Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request consolidates and introduces a comprehensive privacy comparison matrix for various chat platforms, enhancing the documentation and providing users with detailed insights into privacy aspects. It also updates existing documentation with relevant cross-references. Highlights
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Code Review
This pull request introduces a comprehensive privacy comparison document for various communication platforms and updates related files with cross-references. The new documentation is exceptionally detailed and well-structured. The suggested clarifications in the 'AI Training and Data Processing' table for Nostr and Matrix have been retained as they accurately reflect the risks in decentralized/federated platforms where policies are dependent on the server/relay operator, aligning with other documentation.
Note: Security Review has been skipped due to the limited scope of the PR.
| | **Signal** | None (non-profit) | None | N/A | None | | ||
| | **Bitchat** | None | None | N/A | None | | ||
| | **Urbit** | None (self-hosted) | None | N/A | None | | ||
| | **Nostr** | None (protocol-level) | None | N/A | None | |
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The AI training policy and data monetization for Nostr are listed as "None", which could be misleading. While the protocol itself doesn't have these, relay operators can process and monetize any public data they handle. The opsec.md file notes this with "relay operators set own policies". To improve accuracy and align with other documentation, I suggest clarifying that these aspects are relay-dependent.
| | **Nostr** | None (protocol-level) | None | N/A | None | | |
| | **Nostr** | Relay-dependent (public notes) | None | N/A | Relay-dependent | |
| | **Urbit** | None (self-hosted) | None | N/A | None | | ||
| | **Nostr** | None (protocol-level) | None | N/A | None | | ||
| | **XMTP** | None | None | N/A | None | | ||
| | **Matrix** | None (Foundation) | None | N/A | None | |
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The AI training policy for Matrix is listed as "None (Foundation)", which doesn't fully capture the risk in a federated ecosystem. A homeserver administrator can access unencrypted messages and could use them for AI training. The opsec.md file provides a more nuanced take ("Admin can enable"). I suggest updating this entry to reflect that the policy is server-dependent.
| | **Matrix** | None (Foundation) | None | N/A | None | | |
| | **Matrix** | Server-dependent | Optional (bots, bridges) | Server admin control | None | |
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Summary
Consolidates the remaining content from PRs #2773 and #2774 that was not included in the batch merge PR #2771.
Changes
.agents/services/communications/privacy-comparison.md— standalone 308-line detailed comparison matrix covering encryption protocols, metadata exposure, identity requirements, AI training policies, push notification privacy, open source status, self-hosting options, and runner dispatch suitability across 15 platforms (t1385.12).agents/tools/security/opsec.md— adds reference link to privacy-comparison.md after the AI training risk table.agents/services/communications/urbit.md— adds discord.md and msteams.md cross-references to Related section (t1385.13)Context
PRs #2773 and #2774 were superseded by the batch merge in PR #2771, but contained a small amount of content not included in that merge. This PR cherry-picks only the net-new content.
Closes #2759
Closes #2760