---
id: 3866
title: "Demystifying 5G Security: Understanding the Registration Protocol"
source_domain: bishopfox.com
source_url: "https://bishopfox.com/blog/demystifying-5g-security-understanding-the-registration-protocol"
published_at: "2025-09-04 00:00"
tags: ["network-security", "mobile-security", "protocol-security", "5g", "telecom-security", "supi"]
phying_url: "https://phying.com/item/3866"
lang: en
---

# Demystifying 5G Security: Understanding the Registration Protocol

## Summary

A hands-on look at 5G registration security: how UE registration flows through the AMF, and how to test for SUPI disclosure, null/weak encryption (EEA0), and replay attacks, with tooling examples.

## Intelligence Metadata

- **Sources:** bishopfox.com
- **Published:** 2025-09-04 00:00
- **Original:** https://bishopfox.com/blog/demystifying-5g-security-understanding-the-registration-protocol
- **Phying News:** https://phying.com/item/3866