> ## Documentation Index
> Fetch the complete documentation index at: https://capitaloncomguide.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Security

> Protect your Capital One card and account with alerts, 2FA, and card locks.

<div style={{background:"linear-gradient(135deg,#003057,#0067A5)",borderRadius:"20px",padding:"48px 32px",color:"white",marginBottom:"32px"}}>
  <h1 style={{color:"white",fontSize:"36px",margin:0}}>Security</h1>
  <p style={{opacity:0.9,fontSize:"17px",marginTop:"8px"}}>Protect your card and account after activation.</p>
</div>

**Breadcrumb:** [Home](/) › [Categories](/categories) › Security

<CardGroup cols={2}>
  <Card title="Security Tips After Activation" icon="shield-halved" href="/articles/security-tips-after-activation" />

  <Card title="Online Banking Login" icon="right-to-bracket" href="/articles/online-banking-login" />

  <Card title="Troubleshooting" icon="wrench" href="/articles/activation-troubleshooting" />

  <Card title="Activation FAQs" icon="circle-question" href="/articles/activation-faqs" />
</CardGroup>