Def&OffSec

Def&OffSec Cybersecurity Analyst
Defensive & Offensive Sec 🛡️⚔️

28/05/2026

CCNA/Network+ Basics

What is an AI Skill File?Forget copy-pasting massive system prompts into every new chat window. Meet the AI Skill File (...
24/05/2026

What is an AI Skill File?
Forget copy-pasting massive system prompts into every new chat window. Meet the AI Skill File (SKILL . md)—a portable markdown standard designed to give autonomous AI agents immediate, specialized superpowers.
Unlike massive configuration files that hog your context window, a skill file uses smart metadata. The AI only reads the full file when your query matches the skill's specific purpose. It packages step-by-step logic, custom rules, and executable code into a reusable module. This enables developers to deploy identical workflows across platforms like Claude Code, Cursor, and Vercel. It lowers token costs, eliminates hallucinations, and ensures absolute consistency.

AI agents are increasingly being used in cybersecurity research to study how software vulnerabilities can be understood ...
24/05/2026

AI agents are increasingly being used in cybersecurity research to study how software vulnerabilities can be understood and tested in controlled environments. These systems can help automate analysis and speed up experimentation, but they still rely on strict safeguards and expert supervision.

The main impact is improved research efficiency and better understanding of security weaknesses, which ultimately helps defenders strengthen systems and respond faster to potential risks.

Context window is the maximum amount of text (tokens) an AI model can process at one time.It includes the prompt + conve...
24/05/2026

Context window is the maximum amount of text (tokens) an AI model can process at one time.

It includes the prompt + conversation history. Anything beyond it is not visible to the model.

LLM Post-Training Methods (SFT, DPO, ORPO, TTS)Supervised Fine-Tuning (SFT), Direct Preference Optimization (DPO), Odds ...
24/05/2026

LLM Post-Training Methods (SFT, DPO, ORPO, TTS)

Supervised Fine-Tuning (SFT), Direct Preference Optimization (DPO), Odds Ratio Preference Optimization (ORPO), and Test-Time Scaling (TTS) are key post-training techniques used to refine large language models for better instruction following, alignment, and reasoning performance.

They help transform a base model into a more helpful, accurate, and aligned system.

LLMs: Pre-training vs Post-trainingPre-training is the stage where a model learns language, patterns, and general knowle...
24/05/2026

LLMs: Pre-training vs Post-training

Pre-training is the stage where a model learns language, patterns, and general knowledge from large datasets. It builds the foundation of understanding.

Post-training is the refinement stage where the model is tuned to follow instructions better, improve accuracy, and align with human feedback and safety rules.

In simple terms:
Pre-training = foundation learning
Post-training = alignment & specialization

🛡️ CAI — Open-Source AI Cybersecurity FrameworkBuild and deploy intelligent security agents for pentesting, automation, ...
24/05/2026

🛡️ CAI — Open-Source AI Cybersecurity Framework

Build and deploy intelligent security agents for pentesting, automation, and advanced research workflows.

• Supports 300+ AI models (OpenAI, Claude, Ollama & more)
• Built-in tools for recon, exploitation & security testing
• Agent-based design for both offensive & defensive operations
• Includes prompt injection defenses & safety guardrails
• Actively used in CTFs, bug bounty hunting & real-world scenarios

KaliGPT - AI for HackersKaliGPT brings AI into Kali Linux with a simple CLI - helping with pentesting, OSINT, and SOC ta...
24/05/2026

KaliGPT - AI for Hackers

KaliGPT brings AI into Kali Linux with a simple CLI - helping with pentesting, OSINT, and SOC tasks using multiple LLMs.

🛡️ Anthropic Cybersecurity Skills — AI Security LibraryAI is changing cybersecurity fast… but tools alone aren’t enough....
22/05/2026

🛡️ Anthropic Cybersecurity Skills — AI Security Library

AI is changing cybersecurity fast… but tools alone aren’t enough.
You need structured skills, workflows, and real use-cases.

This library packs 750+ production-ready cybersecurity skills designed for AI agents.

From real-world work like: • Threat Hunting
• DFIR investigations
• Red Team operations
• AppSec & Cloud security

Everything is mapped to frameworks like
MITRE ATT&CK,
MITRE D3FEND, and
National Institute of Standards and Technology

21/05/2026

🚀 Real-Time AI Driving System

Lane Detection 🛣 | YOLO Object Detection 🚗 | Distance Estimation 📏

Turning a simple camera into a smart AI assistant 🤖

21/05/2026

osirisai . live - a free, open-source global intelligence platform:

Real-Time Tracking:

10,000+ commercial, military and private aircraft live on a 3D globe

\- 2,000+ satellites including ISS

\- 1,400+ worldwide CCTV camera feeds

\- Earthquakes, wildfires, nuclear facilities and severe weather

Built-In OSINT Tools (no installs needed):

Nmap port scanning from the browser

\- DNS record lookup and enumeration

\- WHOIS domain intelligence

\- SSL/TLS certificate transparency

\- BGP routing and ASN lookup

\- Threat intelligence and IP reputation

All running on a 3D interactive globe with day/night cycle, 20+ live API feeds, and a SIGINT news aggregator.

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