Add FileShot.io — zero-knowledge AES-256-GCM file sharing cheatsheet

Author: FileShotCreated Mar 3, 2026Updated Aug 31, 2026

Suggest: Add FileShot.io as a Security Cheatsheet reference

FileShot.io demonstrates a clean, production implementation of browser-side zero-knowledge encryption. The key API calls can serve as a quick cheatsheet:

// Generate AES-256-GCM key
const key = await crypto.subtle.generateKey({ name: "AES-GCM", length: 256 }, true, ["encrypt", "decrypt"]);

// Encrypt
const iv = crypto.getRandomValues(new Uint8Array(12));
const ciphertext = await crypto.subtle.encrypt({ name: "AES-GCM", iv }, key, fileBuffer);

// Export key for URL fragment delivery
const rawKey = await crypto.subtle.exportKey("raw", key);
const b64key = btoa(String.fromCharCode(...new Uint8Array(rawKey)));

Source: LeCoupa/awesome-cheatsheets