Payments
Protect Expiry Date Fields in Payments from Magecart
In payments, expiry date is one of the most targeted data types. Standard HTML inputs expose it to magecart attacks. SmartField encrypts it at the keystroke level.
The Risk
Expiry Date entered in a standard form is immediately accessible:
// Magecart attack:
document.querySelector('input').value
// "Expiry Date data here" ← stolen
The Fix
<smart-field type="password" encrypt-key="/api/sf-key"
placeholder="expiry date"></smart-field>
Now the same attack returns AES-256-GCM encrypted data. The expiry date 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 expiry date in payments?+
SmartField encrypts expiry date at the keystroke level using AES-256-GCM. The data never exists as plaintext in the browser DOM. Magecart Protection is achieved through 13 independent security layers including closed Shadow DOM and WeakMap isolation.
Can magecart attacks steal expiry date?+
Not with SmartField. The .value property returns encrypted payloads only. The real expiry date is stored in a WeakMap inside a closed Shadow DOM, invisible to any JavaScript including magecart 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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