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
Header Hardening Can't Be a One-Time Job
A Content Security Policy is only as strong as its last deployment — and the HTTPS it rides on depends on cryptography that quantum computing will break. Executive Order 14412, "Securing the Nation Against Advanced Cryptographic Attacks," sets legally binding federal deadlines for post-quantum migration: key establishment by December 31, 2030 and digital signatures by December 31, 2031. Every release can silently weaken a CSP or transport configuration, so verifying them once tells you nothing next week. QRedSentinel re-checks your headers and transport configuration after every release, turning point-in-time assurance into a standing guarantee.
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