Who publishes this site, and what it does with your data

Publisher

This site is published by Damien Chapus, sole trader — computer programming (French activity code APE 62.01Z), SIRET 48240994300024, registered with the Antibes trade and companies register.

Contact: contact@horizonbuilder.space

Publication director: Damien Chapus.

Nature of the club

The Radar club is an informal grouping: it is neither a declared association nor a political party under the French Act of 11 March 1988. It has no legal personality, collects no membership fees, holds no bank account and receives no donations. Membership is free and carries no financial commitment.

Accordingly, the data controller is Damien Chapus, in a personal capacity.

Hosting

Site and data hosted by Hostinger International Ltd, on a server located in Frankfurt, Germany — that is, within the European Union. No member data is transferred outside the Union.

Data we keep

For club membership, only:

• the name you choose to display — a pseudonym is fine;
• your email address;
• the joining date (to the month), your member number and your level;
• proof of your consent: the exact text accepted, and its timestamp;
• since 19 October 2026, your occupation (a category from a list) and your job title, and, once the request is approved, the date your supporting documents were checked.

Your supporting documents (proof of employment, tax notice) are kept only for the time of the check — see below. Apart from them, we collect no real identity, no postal address, no phone number. The site sets no cookies, uses no third-party analytics service, and loads no external resources — with one exception that you trigger yourself: the cadastral map on the Insight France page. When you open it, your browser asks their publishers directly for the layer images and the details of the point you tap: the French mapping agency IGN (data.geopf.fr, apicarto.ign.fr), the geological survey BRGM (geoservices.brgm.fr) and, for the postcode, the open-data platform Opendatasoft (public.opendatasoft.com). They therefore receive your IP address and the area you are viewing. Until you open the map, nothing is requested from anyone.

How we count visits

We count visits with our own tool, on our own server. Nothing is sent to a third party, and no individual visit is ever stored: we keep daily counters only — how many pages were viewed, which ones, from which site, in which language, and where people stop inside a form.

To tell two visitors apart without tracking them, a technical fingerprint is computed in memory from your IP address, your browser and a random secret that is renewed daily and never written down. It is irreversible, it disappears the same day, and two visits from the same device on two different days cannot be linked — not even by us. Your IP address is never stored.

That is why no banner is forced on you: with no cookie and no data that could identify you, your consent is not required. We would rather count less accurately than follow you around.

Why this is sensitive data

Joining a political club reveals a political opinion. That is sensitive data under Article 9 GDPR, whose processing is prohibited in principle — except, precisely, on the basis of your explicit consent (Article 9(2)(a)). That is the only legal basis we rely on, which is why the form's checkbox is never pre-ticked.

The members' register is encrypted at rest (AES-256-GCM). Your membership is never sent by email: internal notifications contain a number only, never a name or an address.

Membership is subject to approval

A membership request is not a membership. It is reviewed by hand, and three things can happen to it:

• Pending. Your request is recorded and encrypted exactly like a membership, but it opens nothing: no card link is sent, no access is granted. To withdraw it before a decision, write to contact@horizonbuilder.space — this is the only moment when one-click erasure is not yet available to you.
• Approved. You receive your card link. From then on you erase yourself, whenever you want.
• Refused. ⭐ Your request is erased, immediately and entirely. We keep no register of refused people: no name, no address, no proof of consent, no supporting document remains. Nothing stops you from asking again later.

The reason is simple: a request carries a political opinion, and a refused person never received a card — so they would have no way to trigger erasure themselves. We do not keep political opinions about people we gave nothing to.

Supporting documents for a membership request

Since 19 October 2026, a request to join the club comes with two documents: an up-to-date proof of employment and position (employment contract, employer's certificate or payslip less than three months old) and a recent tax assessment notice. We ask you to redact before sending everything not needed: amounts, salary, tax number, notice reference, family situation. Only your name, your employer, your job title, the date of the document and the tax year need to remain legible.

• Purpose: to check the applicant's professional profile before deciding on the request. Nothing else.
• Legal basis: your consent, given through a dedicated box when uploading, and steps taken at your request before membership (GDPR, Art. 6(1)(a) and 6(1)(b)).
• Recipient: the club's administrator alone, who views them behind a password and a second authentication factor. The files are encrypted (AES-256-GCM) on our Frankfurt server, outside any public part of the site, and are never passed on to anyone.
• Retention: until the decision, and 30 days at most after upload. On the decision — accepted or refused — the documents are destroyed. After an approval we keep only your occupation, your job title and the note "documents checked on …". With no decision after 30 days, the documents are erased automatically and may be asked for again. Documents uploaded without the request being sent afterwards are erased automatically within two hours.
• Your rights: access, erasure and withdrawal of your consent at any time before the decision, by writing to contact@horizonbuilder.space: your request and its documents are then erased.

Retention

Your data is kept for as long as your membership is active — except your supporting documents, destroyed as soon as your request is decided (see above). You may end it at any time, in one click, from your membership card: deletion is immediate and permanent, with no request to make and no waiting period.

Your card is also your member space: there is no account and no password. The card link is the only key, which is why we cannot recover it for you — we can only send it again to the address you gave.

Your rights

You have the rights of access, rectification, erasure, restriction, objection and portability. Erasure is exercised directly from your card, without going through us. For the other rights, write to contact@horizonbuilder.space.

You may lodge a complaint with the French data protection authority, CNIL.

The data the Radar publishes

The figures shown come from the DSA transparency register kept by the European Commission and publicly accessible. They are filed by the platforms themselves: we republish and recount them, we do not produce them. Our method and limits are set out on the Radar page.

Code analyses concern repositories published under open licences by their authors. We observe measured gaps; we characterise no breach — that is for the regulator.

Intellectual property

The texts and visuals of this site belong to its publisher. Data from the European register remains subject to its original terms. The analysed code is distributed by its authors under the Apache 2.0 licence.