Programming Tutorials

  You have optimized your Rust logic, compiled to   wasm32-unknown-unknown   with   atomics   enabled, and implemented parallelization using Rayon. Yet, when you load the application in Chrome or Firefox, the WebAssembly module fails to instantiate, or the main thread panics with a specific, cryptic runtime error: Uncaught ReferenceError: SharedArrayBuffer is not defined This is not a Rust compilation error. It is a browser security enforcement. By default, modern browsers disable the  SharedArrayBuffer  constructor—the primitive required for WebAssembly threads to share memory—unless the context is "Cross-Origin Isolated." To unlock multithreading in the browser, you must explicitly configure the  Cross-Origin Opener Policy (COOP)  and  Cross-Origin Embedder Policy (COEP)  headers on your server. The Root Cause: Spectre and Side-Channels The disabling of  SharedArrayBuffer  is a direct mitigation against  Spectre ...

  Standard Dynamic Application Security Testing (DAST) tools are notoriously bad at detecting Insecure Direct Object References (IDOR). Tools like OWASP ZAP or Arachni typically operate on a fuzzing basis—they throw garbage data at inputs and look for crashes or 500 errors. They fail at IDORs because an IDOR is not a syntactic error; it is a logic error. If User A requests User B’s invoice and the server returns a 200 OK with the invoice data, a generic scanner interprets this as a successful, valid request. It lacks the context to know that User A  should not  have access to that data. Reliance on manual testing (Burp Suite Repeater) for these checks introduces a bottleneck. As you move towards continuous deployment, you need a way to codify "User A accessing User B data" into a regression test that runs on every commit. The Root Cause: Context-Blind Authorization Under the hood, most web frameworks separate  Authentication  (Who are you?) from  Authorizat...