# **crypt.fyi --a secure sharing tool for zero-knowledge encryption ** **crypt.fyi** is an application specifically designed for secure and private information transfer. Through zero-knowledge architecture and end-to-end encryption, you can share sensitive content such as passwords, private files, and one-time messages with confidence-without worrying about being peeped in by servers or third parties. Whether it's confidential information at work, access keys needed by partners, or temporarily sent private content, crypt.fyi can provide you with a secure, concise and reliable sharing experience. --- ##Focus onthe main characteristics ###** End-to-end encryption (E2EE)** Protect your data using post-quantum encryption (ML-KEM) to ensure that content is decrypted only on your device and the recipient's device. ###** Zero-Knowledge Architecture ** The server never touches plaintext data or decryption keys-your privacy does not depend on trust in the platform. ###** Burn immediately after reading/destroy automatically ** * Content can be set to be destroyed immediately after being read * Supports automatic destruction after reading fails n times * Support setting effective time (TTL) ###ˇ** Password protection (optional)** You can add separate passwords to share content to improve security. ###** File sharing ** Support drag-and-drop uploading of files and securely share documents, pictures, keys or other sensitive information. ###** QR code sharing ** Automatically generate sharing QR codes for convenience of offline or quick delivery. ###** Access limit ** You can customize the number of times the content can be read to further improve control. ###**IP/CIDR Access Whitelist ** Keep your sensitive content accessible only to specific network environments. ###**Webhook callback ** Support triggering notification events after a read success, failure, or content destruction (suitable for team or system integration). ###** Cross-platform support ** * Web application * Chrome extension * Command Line Tool (CLI) * Docker deployment (self-built enterprise intranet environment) ###** Multi-language interface ** Supports multiple languages and continues to expand. --- ##How does it ensure safety? 1. The encryption key is generated locally on your device 2. Content will be encrypted locally before uploading 3. The original values of keys and passwords never leave your device 4. The server only saves ciphertext and hashes for verification, and does not store reversible information 5. The key in the shared link only exists in the hash fragment and will not be recorded by the server 6. The recipient can decrypt content only if it has both the link and password (if set) 7. Content can be destroyed immediately after reading, ensuring one-time read security --- ##Applicable scenarios * Send one-time password, API Token * Sharing sensitive files with customers or colleagues * Temporary transfer of bank information and personal privacy content * Generate one-time accessible secure links * Security callbacks and notifications for internal team automation systems --- ##It's easy to get started 1. open the application 2. Enter text or drag a file 3. Set options (validity time, number of accesses, password, etc.) 4. Generate secure links and share them with each other 5. After the other party opens it, the content can be securely decrypted locally on their device You don't need to register or install additional tools. --- ##APIUsage Tips If you need to call the API in a lazy cat environment, please add the `/api` suffix *** to the basic path shown in the document to ensure normal access to the interface.
