Q-Shield Sentinel: post-quantum readiness, honestly assessed.
YOUR SCORE, 0–100
Three short question screens give you a 0–100 Quantum Resilience Score across five weighted axes: algorithm vulnerability, key-length safety, migration readiness, data exposure and compliance gap. Each result shows the algorithms most at risk, a radar chart, a prioritized roadmap to the NIST post-quantum standards (ML-KEM, ML-DSA, SLH-DSA), your Q-Day estimate and harvest-now-decrypt-later (HNDL) exposure, plus the scoring-method version and the basis of its numbers (your inputs, a model estimate or a what-if scenario).
Your first score needs no account: one a day per device. Until then, a result marked "Sample" shows what you will get.
CHECK A DOMAIN (NEW)
• On the Score tab, enter a domain you control. Q-Shield makes one TLS handshake to its port 443 and shows the protocol, cipher suite, certificate key, signature algorithm and expiry.
• This is shown apart from your answers: the score from your answers, and the score with the observed input. The observed key can only lower your score or keep it the same — never raise it.
• Nothing else is probed, and the certificate itself is not stored.
• Sign in to use it, on any plan, including Free. Up to 10 checks a day.
QUESTIONNAIRES (SENTINEL ECHO)
• Paste the post-quantum questionnaire a customer sent, or import a text file. Echo sorts each question by topic, from crypto inventory to suppliers.
• It drafts an answer only where your assessment or saved scans back it, citing that record, so you can check it before sending. Other questions come back blank, with the reason; pricing, contract, SLA and supplier questions are marked "only you can answer this."
• Not AI: fixed rules — the same questionnaire always gives the same result.
• Keys, certificates or passwords pasted by mistake are caught on your device before upload. Export the answers as a document.
ADVANCED TOOLS AND SIRI (More tab)
• Source freshness for NIST, the GRI threat timeline, arXiv, your domain and your last assessment.
• HNDL threat map (figures: Professional and Enterprise), labelled as a model estimate, not measured traffic.
• Penetration simulation (Professional and Enterprise): eight Shor attack-vector scenarios against your declared algorithms.
• Siri: security health check, threat explanation, audit log — status only, never secrets.
PLANS
• Free: 3 assessments a month, recent history, 1 questionnaire sorted a month, and domain checks.
• Professional and Enterprise add the 22-page PDF Simulation Assessment Report and higher monthly limits — Professional: 100 assessments, 20 PDF reports, 200 penetration simulations, 100 Echo drafts; Enterprise: 500, 100, 1,000 and 500.
• Plans are managed by your organization's administrator. Existing subscribers keep their access and can restore it under More › Your plan.
A SIMULATION, NOT A CERTIFICATION
A deterministic, rule-based simulation mapped to NIST post-quantum standards — not an infrastructure audit, not a certification authority. RSA and ECDSA are not called broken today; they are exposed to data harvested now for later decryption. Q-Shield never asks for or stores your private keys, plaintext or passwords. Results are estimates, not a security certification, and do not guarantee protection against quantum attacks. Decisions based on them are your responsibility.
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Requires iOS 26 or later. Also on Mac. In 7 languages.
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