> For the complete documentation index, see [llms.txt](https://docs.sensecrypt.com/sensecrypt-v3.1.3/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sensecrypt.com/sensecrypt-v3.1.3/appendix.md).

# Appendix

In this section you can find additional information to guide you in your eID journey.

The [Privacy Preserving Biometric Verifiability](/sensecrypt-v3.1.3/appendix/privacy-preserving-biometric-verifiability.md) section talks about the privacy focused features of SensePrints and how they can be verified without storing biometrics.

The [Principles of Privacy Preserving Face Verification](/sensecrypt-v3.1.3/appendix/principles-of-privacy-preserving-face-verification.md) section outlines the fundamental privacy by design goals that the system seeks to build on.

Finally, the [Foundational vs Functional eID](/sensecrypt-v3.1.3/appendix/foundational-vs-functional-eid.md) section highlights how SenseCrypt technology can fit within a bigger picture of a national ID framework having one foundational eID (SensePrint) and multiple privacy preserving functional eIDs (Face Certificates).