Niklas Heringer

@index.niklas-heringer.com.ap.brid.gy

Cybersecurity & Math: Aspiring penetration tester at ERNW, exploring risk, automation, and offense through analysis and experience. 🌉 bridged from ⁂ https://niklas-heringer.com/, follow @ap.brid.gy to interact

0 followers0 following7 stories

Longform Stories

A Hacker's Guide to Post-Quantum Cryptography: ML-KEM & FIPS 203

Everything you need to understand the algorithm that's replacing RSA (in terms of Key Exchange), from polynomial rings to key encapsulation, with zero hand-waving.

May 17·20 min read·3897 words

Active Directory Pentesting: Part 02

This post covers the full GoAD setup, SMB host discovery and OSINT-based username generation to kerbrute enumeration and a first successful authentication against a GoAD domain controller. It's the gr…

Apr 19·22 min read·4308 words

Active Directory Pentesting: Part 01

Before we get offensive, we get grounded. This post covers the AD fundamentals every pentester needs locked in: domains, trees, forests, the Domain Controller as crown jewel, Kerberos SSO, multi-maste…

Apr 13·13 min read·2567 words

Digital Forensics for Beginners: How to Image a Disk, Carve Deleted Files, and Document Everything Like a Pro

Learn how to image a disk with dd, recover deleted files with Foremost and Scalpel, and document your entire investigation with forensic-log-tracker. A step-by-step beginner guide.

Apr 6·22 min read·4243 words

Architecting an Ultra-Minimal Linux VM with Buildroot | Part 1: Build, Break, Fix

Building the smallest bootable Linux VM that passes a professor's audit script. A hands-on walkthrough of Buildroot, from compiling a custom kernel inside Docker to debugging the four failures that br…

Mar 30·21 min read·4156 words

Curing University Math Trauma: A Hacker's Guide to Cryptography

Remember sitting in university linear algebra, staring at the ceiling, begging the universe to tell you when you would EVER use this in the real world? Welcome. In this series, we take the seemingly u…

Mar 8·13 min read·2575 words

Zero to SaaS 01: Let's FINALLY understand Docker

I am reviving a failed university prototype and rebuilding it as my first SaaS. This first post strips away the mess of understanding of Docker, from the Copy-on-Write file system and layer caching to…

Feb 8·9 min read·1774 words