Privacy Policy

Last updated: December 11, 2025 — Terms of Service

This Privacy Policy describes how Bagus Dwi Permana, operating under the trade name ResistanceZero ("Provider", "we", "us", "our"), collects, uses, stores, and protects information when you use our website at resistancezero.com, including all calculators (CAPEX, OPEX, PUE, and future engineering tools), the DC MOC application, articles, and related services (collectively, the "Service").

            Summary: Most calculator data stays in your browser (localStorage). We collect minimal analytics data. We do not sell your personal information. We use cookies only for essential functionality and analytics.
        

1. Information We Collect

1.1 Information You Provide

Data Type	When Collected	Purpose
Email address	Account registration, newsletter signup	Authentication, communication, account recovery
Full name	Account registration	Account identification, reports
Password (hashed)	Account registration	Authentication only — stored as bcrypt hash, never in plaintext
Company/Organization	Optional at registration	Service personalization

1.2 Information Collected Automatically

Data Type	Method	Purpose
Page views, feature usage	Google Analytics (G-GED7FX8RTV)	Service improvement, usage patterns
IP address	Server logs, analytics	Security, fraud prevention, geo analytics
Browser type, OS, device	Analytics, server logs	Compatibility, optimization
Referral source	Analytics	Marketing attribution

1.3 Data Stored Locally in Your Browser

            Important: The following data is stored exclusively in your browser's localStorage and is never transmitted to our servers unless you explicitly export or share it:
        

localStorage Key	Contents	Purpose
`rz_premium_session`	Authentication token, tier, expiry	Account login persistence
`dcmoc-auth`	DC MOC authentication state	DC MOC login persistence
`capex_saved_*`	Saved calculator scenarios	User's saved CAPEX configurations
`opex_saved_*`	Saved calculator scenarios	User's saved OPEX configurations
`pue_saved_*`	Saved calculator scenarios	User's saved PUE configurations
`rz_newsletter_subscribers`	Newsletter subscription data	Newsletter signup tracking

You can clear all locally stored data at any time by clearing your browser's localStorage for resistancezero.com, or by using your browser's "Clear site data" function.

2. How We Use Your Information

Service delivery: To provide, maintain, and improve the calculators, articles, and tools.
Authentication: To verify your identity and manage account access.
Communication: To send account-related notices and security alerts. We will never send unsolicited marketing without your consent.
Analytics: To understand usage patterns, identify popular features, and prioritize improvements.
Security: To detect and prevent fraud, abuse, and unauthorized access.
Legal compliance: To comply with applicable laws, regulations, and legal processes.

3. Information Sharing & Disclosure

We do not sell, rent, or trade your personal data to third parties.

We may share information with:

Service providers: Third-party services that help us operate the Service, including:
- Google Analytics — web analytics (anonymized IP enabled)
- Google Fonts, cdnjs (Cloudflare) — font and icon delivery
- Chart.js (jsDelivr) — chart rendering library
Legal requirements: When required by law, regulation, legal process, or governmental request.
Safety: To protect the rights, property, or safety of ResistanceZero, our users, or the public.
Business transfer: In connection with a merger, acquisition, or sale of assets, in which case your data would remain subject to this Privacy Policy.

4. Cookies & Tracking Technologies

We use the following cookies and similar technologies:

Cookie/Technology	Type	Purpose	Duration
Google Analytics (_ga, _gid)	Analytics	Anonymous usage tracking	Up to 2 years
localStorage (various keys)	Essential	Auth persistence, saved configs	Until cleared

We do not use advertising cookies or third-party tracking pixels. You can disable cookies in your browser settings, though this may affect Service functionality.

5. Data Security

We implement appropriate technical and organizational measures to protect your data:

HTTPS encryption for all data in transit.
Passwords are hashed using bcrypt — never stored in plaintext.
Calculator computations run entirely in your browser — input data is not sent to servers.
Access to production systems is restricted to authorized personnel only.
Regular security audits and vulnerability assessments.

No method of transmission or storage is 100% secure. While we strive to protect your data, we cannot guarantee absolute security.

6. Data Retention

Data Type	Retention Period
Account data	Duration of account + 90 days after deletion
Analytics data	26 months (Google Analytics default)
Server logs	90 days
localStorage data	Until you clear it — we have no access to this data

7. Your Rights

Under Indonesian data protection law (UU Perlindungan Data Pribadi No. 27/2022) and applicable international regulations, you have the right to:

Access: Request a copy of the personal data we hold about you.
Correction: Request correction of inaccurate or incomplete data.
Deletion: Request deletion of your personal data (subject to legal retention requirements).
Restriction: Request restriction of processing of your data in certain circumstances.
Portability: Request your data in a structured, machine-readable format.
Objection: Object to processing of your data for certain purposes.
Withdraw consent: Withdraw previously given consent at any time.

To exercise any of these rights, contact us at bagus@resistancezero.com. We will respond within 30 days.

8. Children's Privacy

The Service is not directed to individuals under the age of 18. We do not knowingly collect personal information from children. If you believe a child has provided us with personal data, please contact us and we will promptly delete it.

9. International Data Transfers

Your data may be processed by third-party services located outside Indonesia (e.g., Google Analytics servers, CDN nodes). These transfers are conducted under appropriate safeguards, including the service providers' data processing agreements and compliance with applicable data protection standards.

10. Third-Party Links

The Service may contain links to third-party websites and services (LinkedIn, GitHub, Discord). We are not responsible for the privacy practices of these external services. We encourage you to review their privacy policies independently.

11. Content Independence

All analytical content, benchmarks, operator data, and calculator methodologies on ResistanceZero are derived exclusively from publicly available sources, independent reading, and self-directed research. No confidential information from any current or former employer, client, or third party is used. This platform is a personal educational project and does not represent any organization. For full details, see Section 6 of our Terms of Service.

12. Changes to This Policy

We may update this Privacy Policy from time to time. When we make material changes:

We will update the "Last updated" date at the top.
We will notify registered users via email for material changes.
Continued use of the Service after changes constitutes acceptance of the updated policy.

13. Contact

For privacy-related questions, data requests, or concerns:

Email: bagus@resistancezero.com
Website: resistancezero.com