Your strongest backend can still be undone in the browser. QSECS audits your Content Security Policy and HTTP security headers to shut down XSS, clickjacking and content-injection attacks — and builds a policy that's strict without breaking your app.
We evaluate the browser-side defenses that contain client-side attacks when other controls fail.
Even a perfectly secured backend can be subverted in the user's browser. Content Security Policy and HTTP security headers are the controls that contain cross-site scripting, clickjacking and content injection when an input slips through.
QSECS audits your existing policy for real, demonstrable bypasses, then engineers a strict-but-workable policy and header set — staged safely in report-only mode — so protection ships to production without breaking your application.
Content Security Policy strength — unsafe directives, wildcards and bypassable allowlists
Clickjacking protection via frame-ancestors and X-Frame-Options
Transport hardening with HSTS and secure cookie attributes
Cross-origin policies — CORS, COOP, COEP and referrer leakage
Legacy and missing headers that widen your client-side attack surface
The Quantum Clock Is Ticking
Security experts estimate quantum computers capable of breaking RSA-2048 encryption could arrive by 2030-2035. Adversaries are already running "Harvest Now, Decrypt Later" campaigns — collecting encrypted data today to decrypt the moment quantum hardware matures. Every test we run is framed by that post-quantum reality, not just today's threats.
We deliver a policy that meaningfully reduces risk and actually ships — not a theoretical ideal that breaks production.
We test your existing CSP for real bypasses, including script-gadget and nonce-reuse attacks
We design a tailored, least-privilege policy mapped to your application's true dependencies
We provide ready-to-deploy header configurations for your web server or CDN
We stage policy in report-only mode so you can roll out strict rules without breakage
We retest to confirm the hardened headers block the attacks we demonstrated