> ## Documentation Index
> Fetch the complete documentation index at: https://www.marqeta.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Security

> See how Marqeta actively protects you and your customers' digital information from unauthorized access, corruption, and theft throughout its lifecycle.

At Marqeta, security is paramount:

* Marqeta’s world-class data centers deploy the latest in hardware and software security best practices.

* Communication with all Marqeta platform services requires TLS 1.2 or higher.

* Marqeta maintains PCI DSS level 1 and SSAE-18 compliance certifications.

* Marqeta employs bank-grade encryption for PII, PCI, PIN data-in-transit, and data-at-rest.

* Funding source payment card numbers (PANs) are not stored on our servers; we only store tokens for these payment instruments.

* Your program has a dedicated production environment that segregates your data from other Marqeta programs.


## Related topics

- [Signature Verification](/docs/developer-guides/signature-verification.md)
- [Rate Limiting](/docs/core-api/rate-limiting.md)
- [About 3D Secure](/docs/developer-guides/about-3d-secure.md)
- [3D Secure Overview](/docs/developer-guides/3ds-landing-page.md)
- [PCI Compliance Overview](/docs/developer-guides/pci-compliance-landing-page.md)