Cryptool

Cryptool is a dedicated open-source application designed to safeguard your most critical information with complete transparency. Unlike many tools that operate as black boxes, Cryptool openly displays the algorithms and data processes, empowering you to verify every step yourself. As a nonprofit project, it has no interest in collecting or using your data—instead, it encourages you to take control: block its internet access, review its code, or even build the app independently for maximum assurance.

Lightweight and Modern Design
The app is built to be efficient and visually clean, featuring a Material You-inspired interface that supports both light and dark themes. It feels smooth to navigate, and the adaptive theme seamlessly blends with your device’s aesthetics.

Flexible Encryption Configurations
You can manage multiple encryption setups as separate conversations, making it easy to switch between different contexts or security needs without overlap or confusion.

Multiple Message Sources
Cryptool supports a range of input methods:
- Manual: You handle all inputs and outputs directly.
- LAN: Communicate securely within your local network; sessions are temporary and vanish when the app closes.
- File: Use file-based communication with options for auto-sync and real-time sharing.
- SMS: Send encrypted messages via your SMS provider (standard messaging rates may apply).

Advanced Security Features
The app incorporates a keystore for managing encryption keys, supports various algorithms for interoperability, and offers clipboard controls to prevent unintended data exposure. Import and export functions include custom code protection and data filtering, while access can be guarded using forget/reset options, changeable codes, or biometric identification.

Cryptool doesn’t ask for your trust—it invites your scrutiny. Ideal for privacy-conscious users, developers, or anyone seeking verifiable security, this tool puts power and transparency in your hands. To explore further or contribute, visit the project’s GitHub repository: https://github.com/nfdz/Cryptool