Payments
Protect CVV Fields in Payments from JavaScript Skimmer
In payments, cvv is one of the most targeted data types. Standard HTML inputs expose it to javascript skimmer attacks. SmartField encrypts it at the keystroke level.
The Risk
CVV entered in a standard form is immediately accessible:
// JavaScript Skimmer attack:
document.querySelector('input').value
// "CVV data here" ← stolen
The Fix
<smart-field type="password" encrypt-key="/api/sf-key"
placeholder="cvv"></smart-field>
Now the same attack returns AES-256-GCM encrypted data. The cvv never exists as plaintext in the browser.
What the Attacker Gets
document.querySelector('smart-field').value
// "eyJ2IjoxLCJpdiI6IkNxT3..." ← 600+ chars of encrypted gibberish
Useless without your server's RSA-2048 private key.
Compliance
SmartField uses NIST-approved algorithms: AES-256-GCM (SP 800-38D) and RSA-2048 (SP 800-56B). Compatible with PCI-DSS, HIPAA, GDPR, SOX, and FISMA requirements.
Frequently Asked Questions
How does SmartField protect cvv in payments?+
SmartField encrypts cvv at the keystroke level using AES-256-GCM. The data never exists as plaintext in the browser DOM. JavaScript Skimmer Protection is achieved through 13 independent security layers including closed Shadow DOM and WeakMap isolation.
Can javascript skimmer attacks steal cvv?+
Not with SmartField. The .value property returns encrypted payloads only. The real cvv is stored in a WeakMap inside a closed Shadow DOM, invisible to any JavaScript including javascript skimmer attacks.
How do I implement this?+
Replace your standard input with smart-field. 2 lines of HTML. Install the server SDK (Node.js, Python, Java, Go, PHP, or Ruby) to decrypt on your backend.
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