add why OpenCloud is secure

docs/admin/welcome/security.md

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+---
+id: opencloud-security
+title: Security in OpenCloud
+sidebar_position: 3
+description: "Overview of OpenCloud's security architecture, encryption, access control, and compliance."
+---
+
+# 🔐 OpenCloud Security Overview
+
+OpenCloud was designed with a strong focus on **security**, **data protection**, and **modern IT architecture**. This page outlines the key security mechanisms that make OpenCloud a secure and reliable solution for organizations of all sizes.
+
+---
+
+## 1. Encryption
+
+OpenCloud protects your data both in transit and at rest using industry-standard encryption technologies:
+
+- **Transport Layer Security (TLS)**  
+  All data transmitted between clients and servers is encrypted using **TLS**, ensuring secure communication and protection from man-in-the-middle attacks.
+
+- **Server-Side Encryption (S3 SSE)**  
+  When using S3-compatible storage, OpenCloud supports **S3 Server-Side Encryption** to secure data directly at the storage layer.
+
+- **Client-Side (End-to-End) Encryption**  
+  OpenCloud leverages the **OS-native encryption capabilities** on user devices, providing local encryption before data is uploaded.
+
+---
+
+## 2. Access Control & Authentication
+
+OpenCloud includes robust mechanisms for authentication and access management:
+
+- **Role-Based Access Control (RBAC)**  
+  Fine-grained permissions based on **roles** ensure users have access only to what they need.
+
+- **Multi-Factor Authentication (MFA)**  
+  Enhance account security with optional **two-factor authentication**.
+
+- **Single Sign-On (SSO) Integration**  
+  OpenCloud supports seamless SSO via:
+  - **LDAP**
+  - **SAML**
+  - **OAuth 2.0**
+
+---
+
+## 3. Auditing & Logging
+
+- **Audit Trails**  
+  Every security-relevant action is logged for compliance and traceability.
+
+- **Monitoring APIs**  
+  Expose detailed logs to integrate with existing monitoring and SIEM systems.
+
+---
+
+## 4. File Protection & Antivirus
+
+OpenCloud provides integrated protection against threats and data leaks:
+
+- **File Firewall**  
+  Prevent uploads of unwanted file types using **allow/deny rules**.
+
+- **Antivirus Integration**
+  - **ClamAV (default)**: Detects malware in uploaded files.
+  - **ICAP support**: Enables external antivirus scanners via **ICAP** protocol.
+
+- **Data Loss Prevention (DLP)**
+  - **Collabora Secure View** ensures files cannot be downloaded or copied — only opened securely in the browser.
+
+---
+
+## 5. Secure File Sharing
+
+Sharing is powerful — and secure:
+
+- **Enforced Passwords for Public Links**  
+  Public links are always protected with passwords. Admins can define strict sharing policies.
+
+- **FileDrop Uploads**  
+  External users can upload files **without accessing internal data**.
+
+- **Expiration for Shared Links**  
+  Automatically remove access after a defined expiration date.
+
+- **Granular Sharing Permissions**  
+  Control actions on shared files: read-only, editing, upload permissions, and more.
+
+---
+
+## 6. Secure Architecture
+
+Built with modern, security-first technologies:
+
+- **No PHP**  
+  Unlike traditional solutions, OpenCloud is written in **Go (Golang)** — fast, secure, and efficient.
+
+- **Vue.js Frontend**  
+  The web interface is built with **Vue.js**, a modern and secure JavaScript framework.
+
+- **REST API**  
+  A comprehensive **REST API** allows secure automation and integrations.
+
+---
+
+## 7. Data Protection & GDPR Compliance
+
+OpenCloud fully supports **data protection regulations**, including:
+
+- **GDPR-Compliant Data Export**  
+  Every user can request a personal data export that meets GDPR standards.
+
+---
+
+## 8. Security Processes
+
+OpenCloud has a clearly defined security policy:
+
+- **Responsible Disclosure Process**  
+  Security issues are handled via a responsible disclosure program.
+
+- **Regular Penetration Testing**  
+  Vulnerabilities are actively tested and remediated.
+
+- **Fast Security Updates**  
+  Thanks to container-based deployment, patches and updates are rolled out quickly.
+
+- **[Security Policy](https://github.com/opencloud-eu/.github/blob/main/profile/SECURITY.md)**  
+  Transparent and documented handling of vulnerabilities.
+
+---
+
+## Conclusion
+
+OpenCloud combines **modern security architecture**, **advanced encryption**, and **enterprise-grade access control** with:
+
+- Secure, microservices-based backend
+- Vue.js-based frontend with modern web security
+- Antivirus, DLP, and secure sharing controls
+- GDPR-compliant data access and export
+- Fast and secure containerized deployments
+
+> OpenCloud is the right choice for teams and organizations that prioritize **data protection**, **compliance**, and **security by design**.