Last updated: 24 April 2026
This privacy policy applies to the CBSE Study Notes e-learning portal ("the site"), served at learning.techvm.in/ai-cs/. The site is published by VM Technologies and compiled by Vivek Maheshwari (MCA). It is a free, non-commercial educational resource for CBSE students.
1. What we collect
We collect the minimum information needed to run the site, prevent abuse, and protect copyright:
- A session cookie (
cbse_sid) — a randomly-generated anonymous UUID. Valid 30 days. Only set if you accept cookies. - A consent cookie (
cbse_consent) — stores your accept / decline choice so we don't show the banner again. Valid 180 days. - Hashed IP address — your IP is salted and hashed with SHA-256; only the first 10 characters of the hash are stored. We cannot recover your real IP from this.
- Request timestamp and User-Agent string.
- Referer header — the previous page URL (if sent by your browser).
2. What we do not collect
- No name, email, address, phone number or any personal identifier.
- No login, no account — you stay anonymous.
- No location data beyond the coarse IP hash.
- No microphone, camera, clipboard, sensor or file access.
- No third-party analytics (Google Analytics, Facebook Pixel, etc.) are loaded on this site.
- No advertising networks.
3. Why we collect it
- Anti-piracy watermark. Each chapter view renders a small on-screen stamp with your 8-character session ID and a hashed IP tag. If the content is leaked as a screenshot, we can match the stamp against our server log to find when the leak happened.
- Rate-limiting. To stop bulk scraping, we refuse more than 120 API requests per minute from the same IP hash.
- Basic analytics. We count total chapter views per day — no individual profiles.
4. How long we keep it
- Session cookie — 30 days (deleted automatically by your browser after that).
- Consent cookie — 180 days.
- Visit logs — rotated when the file reaches 5 MB; purged after 90 days.
5. Who we share it with
No one. The site is hosted on a server operated by VM Technologies. We do not sell, rent, lease or disclose the logs to any third party.
The only exception is a legally-binding court order, in which case we would comply with Indian law (IT Act 2000 and the DPDP Act 2023).
6. Third-party resources
The site loads two external resources for styling and fonts only:
- fonts.googleapis.com and fonts.gstatic.com (Google Fonts — may log your IP for font delivery).
No scripts, pixels or analytic tags from any other domain are loaded.
7. Cookies banner
On your first visit a consent banner asks you to Accept or Decline cookies.
- Accept — a 30-day session cookie is set and a small watermark stamp is shown on every chapter.
- Decline — no persistent cookie. A temporary session ID is generated for each page-load so the watermark still works; it vanishes when you close the tab.
You can reset your choice any time by clearing your browser cookies for this site.
8. Your rights
Under India's DPDP Act 2023 and similar regulations you have the right to:
- Request access to the data we hold tied to your session ID.
- Request deletion of your session log entries.
- Withdraw consent at any time by clearing cookies for this site.
To exercise these rights, email support@techvm.in or mr.vivekmaheshwari@gmail.com with your 8-character session ID (visible in the bottom-right corner of every page).
9. Children's privacy
This site is aimed at CBSE students (typically 14 – 18 years). We collect no personal information from children. The hashed session ID contains zero personally-identifying data.
10. Copyright
All curriculum content is © CBSE / NCERT / PSSCIVE. Our compilation layout and original commentary are © 2026 VM Technologies · compiled by Vivek Maheshwari (MCA). The site is offered free of cost for non-commercial classroom study. Re-distribution for commercial use is prohibited. Attribution is required on any derivative work.
11. Security
Reasonable technical measures are in place: HTTPS encryption in transit, salted hashes for IP addresses, Content-Security-Policy headers, rate-limiting on API endpoints, no passwords stored (we have no login). No system is 100% secure, but we keep the attack surface minimal.
12. Changes to this policy
We may update this page from time to time. The "Last updated" date at the top will change when we do. Material changes will be announced on the home page for 30 days.
13. Contact
Questions? Concerns? Takedown requests?
📧 support@techvm.in (VM Technologies)
📧 mr.vivekmaheshwari@gmail.com (author — Vivek Maheshwari)
You can also reach us through the TechVM contact form at techvm.in/contact.