quartz/docs/plugins/Encrypt.md
2025-07-31 06:52:55 +02:00

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---
title: "Encrypt"
tags:
- plugin/transformer
encryptConfig:
password: "quartz"
message: '^ Password is "quartz"'
---
This plugin enables content encryption for sensitive pages in your Quartz site. It uses AES encryption with password-based access control, allowing you to protect specific pages or entire folders with passwords.
> [!note]
> For information on how to add, remove or configure plugins, see the [[configuration#Plugins|Configuration]] page.
## Configuration
```typescript
Plugin.Encrypt({
algorithm: "aes-256-cbc", // Encryption algorithm (key length auto-inferred)
encryptedFolders: {
// Folder-level encryption with simple passwords
"private/": "folder-password",
"work/confidential/": "work-password",
// Advanced per-folder configuration
"secure/": {
password: "advanced-password",
algorithm: "aes-256-gcm",
ttl: 3600 * 24 * 30, // 30 days
},
},
ttl: 3600 * 24 * 7, // Password cache TTL in seconds (7 days)
})
```
> [!warning]
> It is very important to note that:
>
> - All non-markdown files will be left unencrypted in the final build.
> - Marking something as encrypted will only encrypt the page in the final build. The file's content can still be viewed if your repository is public.
### Configuration Options
- `algorithm`: Encryption algorithm to use. Supported values:
- `"aes-256-cbc"` (default): AES-256 in CBC mode
- `"aes-256-gcm"`: AES-256 in GCM mode (authenticated encryption)
- `"aes-256-ecb"`: AES-256 in ECB mode (not recommended for security)
- Key length is automatically inferred from the algorithm (e.g., 256-bit = 32 bytes)
- `encryptedFolders`: Object mapping folder paths to passwords or configuration objects for folder-level encryption
- `ttl`: Time-to-live for cached passwords in seconds (default: 604800 = 7 days, set to 0 for session-only)
- `message`: Message to be displayed in the decryption page
### Advanced Folder Configuration
You can provide detailed configuration for each encrypted folder:
```typescript
encryptedFolders: {
"basic/": "simple-password", // Simple string password
"advanced/": {
password: "complex-password",
algorithm: "aes-256-gcm", // Override global algorithm
ttl: 3600 * 24 * 30, // Override global TTL (30 days)
message: "This content is encrypted", // Message to be displayed
}
}
```
## Usage
### Folder-level Encryption
Configure folders to be encrypted by adding them to the `encryptedFolders` option:
```typescript
Plugin.Encrypt({
encryptedFolders: {
"private/": "my-secret-password",
"work/": "work-password",
"personal/diary/": "diary-password",
},
})
```
All pages within these folders will be encrypted with the specified password. Nested folders inherit passwords from parent folders, with deeper paths taking precedence.
### Page-level Encryption
Use frontmatter to encrypt individual pages or override folder passwords.
```yaml
---
title: "My Secret Page"
password: "page-specific-password"
encryptConfig:
password: "password-also-allowed-here"
message: "Sorry, this one is only for my eyes"
algorithm: "aes-256-gcm" # Optional: override algorithm
ttl: 86400 # Optional: override TTL (1 day)
---
This content will be encrypted and require a password to view.
```
### Frontmatter Fields
#### encryptConfig object fields:
- `password`: (required) The password required to decrypt this page
- `message`: (optional) Custom message to show on the unlock page
- `algorithm`: (optional) Override the encryption algorithm for this page
- `ttl`: (optional) Override password cache TTL for this page
#### Legacy fields (still supported):
- `encrypt`: Set to `true` to enable encryption for this page
- `password`: The password required to decrypt this page
If a page is in an encrypted folder but has its own password configuration, the page-specific settings will be used instead of the folder settings.
### Security Considerations
- Use strong passwords for sensitive content
- Consider using AES-256-GCM mode for authenticated encryption
- ECB mode is provided for compatibility but is not recommended for security-critical applications
- Key lengths are automatically determined by the algorithm (no manual configuration needed)
## Security Features
### Password Cache
The plugin implements intelligent password caching:
- Passwords are cached in browser localStorage
- Configurable TTL (time-to-live) for automatic cache expiration
- Passwords are automatically tried when navigating to encrypted pages
### Content Protection
- **Full Content Encryption**: The entire HTML content is encrypted, not just hidden
- **SEO Protection**: Search engines and RSS feeds see generic placeholder descriptions
- **Client-side Decryption**: Content is never transmitted in plain text
- **Password Verification**: Fast password hash verification before attempting decryption
## API
- Category: Transformer
- Function name: `Plugin.Encrypt()`.
- Source: [`quartz/plugins/transformers/encrypt.ts`](https://github.com/jackyzha0/quartz/blob/v4/quartz/plugins/transformers/encrypt.ts).