michele-tn / md5.md

Created September 18, 2025 18:38

1. Introduction and scope

Hash functions are ubiquitous in information security: they are used for integrity checks, content-addressed storage, digital signatures, password verification, and more. This document treats three families of constructions that have received the most attention in practice and in the literature: MD5 (an historical design of the MD family), SHA-2 (notably SHA-256, standardized in FIPS 180), and SHA-3 (the Keccak-based family standardized in FIPS 202). Where necessary we contrast the design principles (MerkleDamgrd vs. sponge) and explain the consequences for security. Key primary sources are cited: the MD5 specification (RFC 1321), the SHA standards (FIPS 180-4), the SHA-3 standard (FIPS 202), and major cryptanalytic work on MD5 and related constructions. citeturn0search0turn0search7turn3search2

2. Formal definitions and basic security notions

Let (H:{0,1}^* o{0,1}^n) be a deterministic function mapping binary strings of arbitrary length to fixed-length (n)-bit o

michele-tn / Database Normalization.md

Created September 2, 2025 13:32

Database Normalization: From 1NF to 6NF

Database normalization is a fundamental methodology in relational database design. Its main objectives are:

Reduce redundancy
Prevent anomalies
Maintain data integrity

This document provides an overview of the six normal forms, including BCNF, with practical examples.

michele-tn / DNS Speed Test Script.md

Created August 9, 2025 13:51

DNS Speed Test Script

A simple Bash script to measure and compare DNS query response times from popular public DNS servers.
Outputs aligned ASCII tables showing raw and sorted results by speed.

Tested Environment

michele-tn / Advanced Network Stress-Testing in C#.md

Last active July 8, 2025 09:55

🚀 Advanced Network Stress-Testing in C#

SYN Flood & UDP Flood with Random Source IP and MAC

Simulate DDoS/DoS Attacks for Penetration Testing (Linux, C#, Raw Sockets)

michele-tn / Videojet — Zipher Text Communications Protocol Example.md

Last active September 3, 2025 03:12

🚀 [#SCADA LANGUAGE] Videojet DataFlex 6420 — Zipher Text Communications Protocol Example

This README demonstrates how to communicate with a Videojet printer using the Zipher Text Communications Protocol, as detailed in the official documentation:

📄 Protocol PDF: Zipher Text Coms Protocol v1.21

🔧 Purpose

michele-tn / 🚀 Automated Reverse SSH Port Forwarding.md

Last active June 1, 2025 16:51

🚀 Automated Reverse SSH Port Forwarding

🔐 A Windows Service for Secure SSH Tunneling & Multi-Port Forwarding

🛠 Features

✅ Automated Reverse Port Forwarding – Supports 22, 3389, 5800, 5900
✅ Windows Service Mode – Prevents accidental termination
✅ Auto-Reconnect – If disconnected, reconnects automatically
✅ Encrypted Passphrase – Loads AES-encrypted passphrase from file
✅ Embedded Private Key Security – Uses Renci.SshNet for seamless authentication

michele-tn / Create_VLANs_via_SSH_on_GliNET_OpenWRT_Routers.md

Created May 22, 2025 15:02

🛠️ How to Create VLANs via SSH on OpenWRT Routers (e.g., GL.iNet Mango)

This README provides a step-by-step guide on how to create VLANs on OpenWRT-based routers (such as GL.iNet Mango) using the command-line interface via SSH. VLANs (Virtual LANs) enable network segmentation for enhanced security and management.

📋 Requirements

OpenWRT-compatible router (e.g., GL.iNet Mango)
SSH access to the router

michele-tn / Set Up a #ZeroTier Network on #OpenWRT.md

Last active May 19, 2025 09:28

Overview

michele-tn / Windows 11 - Restore Classic Context Menu.md

Created May 18, 2025 10:17

michele-tn / Backup and Restore GRUB Configuration to Prevent Boot Issues.md

Last active May 17, 2025 15:05

🛡️ Backup and Restore GRUB Configuration to Prevent Boot Issues

Ensure your Linux system remains bootable by backing up GRUB and the Master Boot Record (MBR).

📘 Overview

GRUB (GRand Unified Bootloader) is a critical part of the Linux boot process.
Misconfiguring or damaging it can lead to system boot failures.

michele-tn