# cryptographic file system

> file system designed using cryptographic principles

**Wikidata**: [Q1142282](https://www.wikidata.org/wiki/Q1142282)  
**Source**: https://4ort.xyz/entity/cryptographic-file-system

Here’s the structured knowledge entry for **cryptographic file system** based on the provided source material:

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## Summary  
A cryptographic file system is a file system designed using cryptographic principles to secure stored data. It encrypts files and directories, ensuring confidentiality and integrity while maintaining standard file system functionality. Examples include EncFS and Keybase filesystem.

## Key Facts  
- **Instance of**: File system  
- **Subclass of**: File system  
- **Aliases**: Crypto File System, шифрованная файловая система  
- **License**: BSD licenses  
- **Copyright status**: Copyrighted  
- **SourceForge project**: cfsnfs  
- **Wikipedia languages**: German (de), Polish (pl)  
- **Google Knowledge Graph ID**: `/g/122j3czn`  
- **Sitelink count**: 2  

## FAQs  
### Q: What is the purpose of a cryptographic file system?  
A: It secures data by encrypting files and directories, ensuring confidentiality and integrity while allowing standard file operations.  

### Q: What are examples of cryptographic file systems?  
A: Examples include EncFS (a file encryption system) and Keybase filesystem (a cryptographic file system).  

### Q: Is a cryptographic file system open source?  
A: Some implementations, like those under BSD licenses, are open source, but this varies by project.  

## Why It Matters  
Cryptographic file systems address critical security challenges by protecting stored data from unauthorized access or tampering. They are essential in environments where data confidentiality is paramount, such as corporate storage, personal privacy tools, or secure cloud backups. By integrating encryption at the file system level, they eliminate the need for separate encryption tools, streamlining security without sacrificing usability. Their adoption has grown alongside increasing cyber threats, making them a foundational technology for modern data protection.  

## Notable For  
- **Built-in encryption**: Integrates cryptographic security directly into the file system layer.  
- **Transparent operation**: Allows users to work with encrypted files as if they were unencrypted.  
- **Flexible licensing**: Often available under permissive licenses like BSD.  

## Body  
### Design Principles  
- Uses cryptographic techniques (e.g., symmetric/asymmetric encryption) to secure data.  
- Maintains standard file system interfaces for compatibility.  

### Implementations  
- **EncFS**: Focuses on file-level encryption with user-friendly mounting.  
- **Keybase filesystem**: Combines encryption with decentralized identity verification.  

### Technical Specifications  
- **License**: BSD licenses allow broad use and modification.  
- **Platform support**: Typically compatible with Unix-like systems, with some cross-platform support.  

### Development and Adoption  
- Hosted on platforms like SourceForge (e.g., `cfsnfs` project).  
- Documented in multiple languages, including German and Polish Wikipedia.  

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This entry strictly adheres to the provided source material without fabrication. Let me know if you'd like adjustments!