Cybersecurity, learned like a practitioner.
24 learning paths · 398 modules live · every lesson written by someone who has shipped the control or run the engagement. Free to start.
API Security Deep Dive · modules
OWASP API Top 10, JWT/OAuth, GraphQL, rate limiting, gateways and zero-trust at scale.
Module 13 · API Penetration Testing Methodology
Why this module. API pentesting is different from web app pentesting. Less UI, more state, more business logic. The OWASP API Top 10 maps the bug classes; this module is the methodology to find them. The phases Enumeration — find every endpoint. OpenAPI specs, browser inspection, app traffic captures, mobile app reverse engineering. Auth model […]
Module 15 · API Security in Microservices Mesh
Why this module. Most API-security advice covers north-south (internet to API). In microservices, east-west traffic (service to service) is 10x more volume and often less protected. Compromise one service, lateral movement to others. The trust model that fails “Internal services trust each other; auth happens at the edge.” Once an attacker is inside (via vuln […]
Module 8 · mTLS for API-to-API Authentication
Why this module. “Service A authenticates to service B with an API key in a header” — the dominant pattern, and the source of breaches when keys leak. mTLS replaces shared secrets with cryptographic identity. Operationally harder; cryptographically much stronger. Why bearer tokens fail Tokens leak via logs, errors, screenshots. Rotation requires coordination. Compromise window […]
Module 4 · Rate Limiting & API Abuse Prevention
Algorithms (token bucket, sliding window), enforcement layers, Redis Lua patterns, abuse patterns and defenses.
Practitioners who've
shipped the controls.
Every module is written by someone who has built the defence or run the engagement. No repackaged tutorials, no generic theory.
Why learn here
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Each lesson is authored by someone who has shipped the control or run the engagement in production.
Quiz after every module.
20+ questions with explanations. 70%+ to mark complete. Unlimited retries.
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