Privacy Policy

Last updated: June 2026

Sentinel ("the app") is a "dead man's switch" service that automatically forwards messages and documents to designated recipients if the user becomes unreachable for a prolonged period. This policy explains what data is collected and how it is used, in accordance with the General Data Protection Regulation (GDPR).

1. Data controller

The data controller can be reached at: getssentinel@gmail.com.

2. Data collected

• Account: email address and password (stored encrypted / hashed, never in plain text).
• Recipients: names, email addresses and details you enter.
• Content: messages and documents (attachments) you create for delivery.
• Trusted contacts: optional names and emails.
• Telegram (optional): if you link Telegram (for yourself or for a recipient), we store the conversation identifier ("chat id") needed to deliver messages. You can unlink at any time.
• Technical logs: check-in history and monitoring events, time zone, plus a tamper-proof security audit log (see §8) containing only technical identifiers, never the content of your messages.

3. Purposes and legal basis

Data is processed solely to provide the service. The legal basis is performance of the contract and your consent. We do not use your data for advertising and never sell it.

4. Recipients and processors

• Cloudflare: hosting (servers, database, file storage).
• Resend: email sending (primary provider).
• Brevo: email sending (backup provider, used automatically if the primary fails).
• Telegram: if you enable this channel, notifications are delivered through Telegram Messenger.
• The recipients you designate: receive your messages/documents only upon triggering.

5. Retention

Your data is kept as long as your account is active. It is permanently deleted when you delete your account (immediate erasure of the database and storage). Generated download links expire automatically (30 days by default). Note: the host Cloudflare keeps technical database snapshots ("Time Travel") for a limited period (~30 days), used only for disaster recovery.

6. Your rights (GDPR)

You have the rights of access, rectification, erasure, portability and objection, directly in the app (Settings) or by writing to getssentinel@gmail.com.

7. Deleting your data

You can delete your account at any time via Settings → Delete my account, or from the Account deletion page. A double confirmation is required (typing the word "DELETE" + your password) to prevent accidental deletion. Deletion is immediate and irreversible.

8. Security

Your messages and documents are encrypted at rest (AES-256). Passwords are hashed (PBKDF2), communications encrypted (HTTPS) and file access protected by private, email-verified links.

Additional measures: email address verification at sign-up (6-digit code), anti-bot protection (CAPTCHA) on authentication pages, protections against repeated login attempts, and a tamper-proof audit log (cryptographic hash-chaining) that makes any modification of the security history immediately detectable. This log contains none of your message content, only technical identifiers.

Honest note: this is not "end-to-end" encryption. To automatically forward your messages in your absence, the service must be able to decrypt them at send time.

9. Contact

For any question: getssentinel@gmail.com.

Contact : getssentinel@gmail.com