How this site uses data

The IS'26 conference website collects the minimum data it needs to answer one question: how well is the Call for Papers reaching the intended audience? This page describes exactly what is collected, where it is stored, for how long, and what choices you have.

1. Who is responsible

The IS'26 Organising Committee, operating under the auspices of the Institute of Information and Communication Technologies of the Bulgarian Academy of Sciences (IICT-BAS), Sofia, Bulgaria.

Contact: ieee-is@bas.bg.

2. What is collected

2.1 Analytics (self-hosted Matomo)

On every visit, if you have accepted or not yet answered the banner:

• The page URL you viewed and when.
• The page that referred you (for example an IEEE mailing or a link on LinkedIn). Useful for counting channel reach.
• Which PDF or other file you downloaded, if any (Call for Papers, registration form).
• Which external links you clicked (EasyChair, DBLP, Google Maps).
• Your browser, operating system, device type, screen resolution, and preferred language — aggregate only.
• Your country, derived from your IP address via a local GeoIP database. Only country-level; not city.
• Your IP address with the last two octets masked (for example 93.155.xxx.xxx). The full IP is never stored.

If you clicked Decline — or your browser sends Do Not Track — the same list applies except that no cookies are set, no heatmaps or session recordings are run, and the tracker is loaded in anonymous mode.

2.2 Google Maps embed

The venue section contains an embedded Google Map of Hotel Cherno More. The embed is loaded only after you accept the consent banner. Once loaded, Google may set third-party cookies under its own terms. If you declined, a static placeholder and a text link to Google Maps appear instead; no data is sent to Google.

2.3 Google Fonts

The site uses the typefaces EB Garamond and IBM Plex Sans / Mono, loaded from Google Fonts. The stylesheet is fetched only after you accept the consent banner. If you declined, the browser falls back to local system fonts (Georgia, Segoe UI, etc.); the page looks slightly different but remains fully legible.

3. What is not collected

• Your full IP address — masked before storage.
• Your name, email, or institutional affiliation. Nothing on this site asks for them.
• Cross-site tracking identifiers.
• Any data shared with Google, Meta, or other third parties, except the embedded Google Maps / Fonts described above — and only after you accept.

4. Where data is stored

On the same virtual machine that serves this website, hosted at Plovdiv University, Bulgaria (EU). No data leaves the EU. Matomo is self-hosted — there is no cloud analytics provider.

5. For how long

Raw visit data is retained for the lifetime of the live site and for 14 months after the conference concludes. After that, raw data is deleted and only aggregate reports (exported as CSV) are kept for archival alongside the conference proceedings.

6. Your rights under GDPR

You may at any time:

• Change your consent choice using the Privacy preferences button in the site footer.
• Request access to any data associated with your visit.
• Request erasure of that data.
• Lodge a complaint with the Bulgarian Commission for Personal Data Protection.

For access or erasure requests, write to ieee-is@bas.bg. Because IP addresses are already masked, identifying a specific visit after the fact is not always possible; in that case the request is answered with a summary of the data classes held.

7. Changes

If this notice changes in a material way, the consent banner will reappear the next time you visit. The date below shows when the notice was last reviewed.