Privacy Policy

1. Who is responsible

L0GIC Stamp ("Stamp") is a service of L0GIC LLC, a Washington limited liability company ("L0GIC", "we", "us"). We are responsible for the information described here. This policy covers Stamp only (stamp.l0gic.ai).

2. What we receive when you stamp a file

• Fingerprints of the file: short codes your browser works out from the file, on your device. For pictures, also a fingerprint of the picture itself and fingerprints of details stored with it (such as a capture time or a phone's label). The details themselves are not sent, only their fingerprints. A fingerprint can't be turned back into the file, though someone who already has the very same file could tell it's the one.
• The file's name, only if you tick "Include the file's name". It's left out unless you do.
• Your internet address, as with any website, because your browser connects to our server.

We never receive the file itself.

3. What we receive when you check a stamp

The file and its stamp record are checked inside your browser. To check the time authorities' own signatures, the page sends our server the authorities' replies from the stamp record and a fingerprint of the stamp. It never sends the file or the file's fingerprint.

4. What we keep

• Nothing about your stamps. Our server signs the fingerprints, sends the stamp record back to you, and keeps no copy. That's why we can't look up, recover or delete a stamp: you hold the only copy.
• Your internet address, briefly, in memory only. We use it to limit how many stamps and checks one address can make in an hour. It's held only in the server's memory and forgotten about an hour later, whether or not anyone else visits. It's not written down.
• No access log. The web server doesn't keep a log of visitors. Our program's own log records only which page or action was requested and whether it worked, with no addresses, fingerprints or names.
• Error logs. When something goes wrong with a request (for example, a request that is too large, is refused, or causes a server error), the web server's error log may record the internet address involved. Error logs are deleted automatically after about two weeks.
• Emails you send us (for example to report a problem) are kept as long as needed to answer you, and deleted on request.

5. Who else is involved

• Time authorities (DigiCert and Sectigo). To get a trusted time, our server sends each of them a fingerprint of the stamp. They never receive your file, its name, or your internet address; they see only our server.
• Hostinger runs the server Stamp is on, and the support@l0gic.ai mailbox.
• Let's Encrypt provides the certificate for the secure (https) connection. Our server sends it no visitor information.
• We share information when the law requires it, for example under valid legal process. Because we keep almost nothing, there is very little to share.

We don't sell or rent personal information, and we don't share it for advertising.

6. Cookies and tracking

Stamp uses no cookies and stores nothing in your browser. The pages load nothing from other companies: no outside fonts, analytics, advertising or trackers.

7. Sensitive files

If a file holds health, legal or other sensitive information, it still never leaves your device; only its fingerprints do. The file's name is left out by default. If you choose to include it, avoid names that contain a patient's or client's details.

8. Your rights

Depending on where you live, you may have the right to access, correct or delete personal information we hold about you, to move it, or to object to or restrict how we use it. Because we keep no record of your stamps, there is usually nothing of yours to give, change or delete. For emails you sent us, or any other question, write to support@l0gic.ai.

9. Children

Stamp is not meant for children under 16, and we don't knowingly collect personal information from them.

10. Where information is handled

Stamp's server is in the United States. If you use Stamp from elsewhere, the little we receive is handled there.

For people in the EU, EEA or UK: we handle your internet address for the hourly limit and error logs on the basis of our legitimate interest in keeping Stamp available and secure (GDPR Art. 6(1)(f)); the fingerprints, and the file's name if you include it, to provide the stamp you ask for (Art. 6(1)(b)); and emails you send us to answer them (Art. 6(1)(b) and (f)).

For California residents: we don't sell or share personal information, including for cross-context behavioral advertising, and we don't collect sensitive personal information.

11. Security

We use reasonable technical and organizational safeguards, including encrypted connections and keeping almost no data at all. No system is perfectly secure. Because Stamp keeps no contact details, we can't reach you directly: if a personal data breach ever affects information covered by this policy, we will post a notice on this page and notify the authorities as the law requires.

12. Changes

We may update this policy. The date at the top shows the latest version. If we ever start keeping more than this policy says (for example a public daily record of stamps), we will update this policy before we do.

13. Contact

Privacy questions: support@l0gic.ai