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You WILL lose your data. Do not use it for anything important.**\n\nFor stable CryFS, please use [CryFS 1.0](https://github.com/cryfs/cryfs/tree/release/1.0). You can find installation instructions for the stable version [here](https://www.cryfs.org/#download).\n\nCryFS 2.0 is in an alpha stage that has not undergone extensive testing. Use it only for testing purposes and please report any issues in the [GitHub issue tracker](https://github.com/cryfs/cryfs/issues).\n\n---\n\n## What is CryFS?\n\nCryFS encrypts your files so you can safely store them in cloud storage services like Dropbox, iCloud, or OneDrive. Unlike other encryption tools that encrypt files individually, CryFS encrypts your files in a way that also hides file sizes, directory structure, and metadata, providing a higher level of security.\n\nLearn more at [https://www.cryfs.org](https://www.cryfs.org)\n\n## What's New in CryFS 2.0?\n\nCryFS 2.0 is a complete rewrite from scratch in Rust, bringing improved memory safety. This version is currently in alpha and represents a major evolution of the project.\n\n### Key Changes\n\nTo ensure compatiblity with CryFS 1.0, CryFS 2.0 does not add any features that would make the filesystem incompatible with Cryfs 1.0. New breaking changes are planned for future versions after CryFS 2.0 is stable. However, there are a few minor differences between CryFS 1.0 and 2.0.\n\n**New Features:**\n- Configurable scrypt parameters when creating new file systems\n- Updated default scrypt parameters for better security\n- Human-readable duration format for `--unmount-idle` (e.g., `5m`, `1h30m`)\n- More explicit units for `--blocksize` (e.g., `16KiB`)\n- More flexible logging with `--log` argument (e.g., `--log file:/path/to/file.log`)\n\n**Breaking Changes:**\n- Command line options have changed (see [Command Line Changes](#command-line-changes) below)\n- Limited cipher support: only XChaCha20 and AES are available\n- Reduced platform support: only Linux is currently supported\n\n## Platform Support\n\n| Platform | Status |\n|----------|--------|\n| Linux    | ✅ Working |\n| macOS    | ❓ Untested (may or may not work) |\n| Windows  | ❌ Not yet supported |\n\n## Compatibility with CryFS 1.0\n\n### Filesystem Compatibility\n\nFile systems are **fully forward and backward compatible** between CryFS 1.0 and 2.0, with important caveats:\n\n✅ **Compatible:**\n- File systems created with XChaCha20 cipher (the default in 1.0 and 2.0)\n- File systems created with AES-256-GCM cipher\n- Integrity checks using block versioning are fully compatible\n\n⚠️ **Partially Compatible:**\n- Local state files: The filesystem ID verification (protection against filesystem replacement attacks) uses separate local state files in 1.0 vs 2.0. Both versions perform this check, but they don't sync with each other.\n\n❌ **Incompatible:**\n- File systems created with other ciphers (e.g., Twofish, Serpent) are not accessible in CryFS 2.0\n- There are no plans to add all ciphers from CryFS 1.0 to the Rust version because many are outdated and don't have an implementaton that can be called from Rust easily.\n\n### Command Line Changes\n\nThe following command line arguments have changed:\n\n| 1.0 Syntax | 2.0 Syntax | Notes |\n|------------|------------|-------|\n| `--unmount-idle 10` | `--unmount-idle 10m` | Now requires unit: `5m`, `1h30m`, etc. |\n| `--blocksize 16384` | `--blocksize 16KiB` | Now requires unit: `16KiB`, `1MiB`, etc. |\n| `--logfile /path/to/file.log` | `--log file:/path/to/file.log` | More generic logging format |\n| `cryfs vaultdir mountdir -- -o allow_other` | `cryfs vaultdir mountdir -o allow_other` | Double-dash syntax removed |\n\nThe list of supported FUSE options that can be passed in with `-o` is now limited to options that are known to work well with CryFS. See `cryfs --help` for the complete list.\n\n## Installation\n\n### Linux\n\n#### Building from Source\n\n**Prerequisites:**\n- Rust toolchain (install from [rustup.rs](https://rustup.rs))\n- Build dependencies\n  - Ubuntu/Debian: `sudo apt install build-essential pkg-config libssl-dev`\n  - Fedora: `sudo dnf install fuse3-devel`\n  - Arch: `sudo pacman -S fuse3`\n\n**Build and Install:**\n```bash\ngit clone https://github.com/cryfs/cryfs\ncd cryfs\ncargo build --release\nsudo cp target/release/cryfs /usr/local/bin/\n```\n\n### macOS\n\nNot yet tested. May work if you have macFUSE installed, but no guarantees.\n\n### Windows\n\nWindows support is not yet available in CryFS 2.0.\n\n## Usage\n\n### Creating a New Encrypted Filesystem\n\n```bash\ncryfs /path/to/encrypted/storage /path/to/mountpoint\n```\n\nYou'll be prompted to create a password. CryFS will create its encrypted storage in the first directory and mount the decrypted filesystem at the mountpoint.\n\n### Mounting an Existing Filesystem\n\nUse the same command:\n\n```bash\ncryfs /path/to/encrypted/storage /path/to/mountpoint\n```\n\nYou'll be prompted for your password.\n\n### Unmounting\n\n```bash\nfusermount -u /path/to/mountpoint\n```\n\nOr on macOS:\n```bash\numount /path/to/mountpoint\n```\n\n### Advanced Options\n\n```bash\n# Auto-unmount after 30 minutes of inactivity\ncryfs /path/to/encrypted /path/to/mount --unmount-idle 30m\n\n# Allow other users to access the filesystem\ncryfs /path/to/encrypted /path/to/mount -o allow_other\n\n# Log to a file\ncryfs /path/to/encrypted /path/to/mount --log file:/tmp/cryfs.log\n\n# Show all available options\ncryfs --help\n```\n\n## Graphical User Interfaces\n\nCryFS can be used through GUI applications:\n- [SiriKali](https://mhogomchungu.github.io/sirikali/)\n- Plasma Vault (included in KDE Plasma 5.11+)\n\nNote: GUI compatibility with CryFS 2.0 has not been tested yet.\n\n## Known Issues\n\n### Performance\nCryFS 2.0-alpha is currently **slower than 1.0** due to lack of optimizations. Performance improvements are planned for future releases.\n\n### Stability\nAs alpha software, expect bugs and potential data loss. Known risks include:\n- Filesystem corruption if the process is interrupted during writes\n- Data loss if the disk runs out of space during write operations\n- Corruption if the filesystem is accessed from multiple devices simultaneously without proper synchronization\n\n### Recovery\nThere is currently no filesystem recovery tool for corrupted CryFS filesystems. **Back up your data regularly.**\n\n## Security Notes\n\n### Password Changes\nIf your password is compromised, creating a new filesystem and migrating your data is strongly recommended, as CryFS does not support secure password rotation.\n\n### Cipher Selection\nCryFS 2.0 supports:\n- **XChaCha20-Poly1305** (default, recommended)\n- **AES-256-GCM**\n\nXChaCha20 is the recommended cipher for new filesystems due to its strong security properties and performance characteristics.\n\n### Scrypt Parameters\nCryFS 2.0 allows you to configure scrypt parameters when creating a new filesystem, allowing you to adjust the time/memory tradeoffs for password derivation based on your security needs.\n\nLarger parameters are more secure but mean the filesystem will be slower to mount, and devices with low memory might not be able to open it at all. There is no performance impact on filesystem operations after it was mounted, only the initial mounting is affected.\n\nIf you want to use a filesystem from devices with very low memory, lowering the scrypt parameters can help.\n\n## Contributing\n\nContributions are welcome! Please:\n1. Check the [issue tracker](https://github.com/cryfs/cryfs/issues) for known bugs and feature requests\n2. Test CryFS 2.0 and report any bugs you find\n3. Submit pull requests with improvements\n\nSince this is alpha software, testing and bug reports are especially valuable.\n\n## License\n\nCryFS is licensed under the LGPL v3. See the LICENSE file for details.\n\n## Links\n\n- Website: [https://www.cryfs.org](https://www.cryfs.org)\n- GitHub: [https://github.com/cryfs/cryfs](https://github.com/cryfs/cryfs)\n- Issue Tracker: [https://github.com/cryfs/cryfs/issues](https://github.com/cryfs/cryfs/issues)\n- CryFS 1.0 (stable): [https://github.com/cryfs/cryfs/tree/release/1.0](https://github.com/cryfs/cryfs/tree/release/1.0)\n","funding_links":["https://github.com/sponsors/smessmer cryfs"],"categories":["TODO scan for Android support in followings","C++","\u003ca name=\"cpp\"\u003e\u003c/a\u003eC++","cloud","Rust"],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcryfs%2Fcryfs","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fcryfs%2Fcryfs","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcryfs%2Fcryfs/lists"}