Your private messenger

Here, I have made a very easy to use steganography tool. It allows for parties to communicate(bi-directionally) openly/publicly in "plain sight" but would only appear as the transferring of digital photos at fist glance. But, "hidden data" is actually embedded within the images. This tool allows for both extracting data from digital images as we…

A PoC to check Service to Service authentication using two-way SSL.

Secure distributed email service with Java RMI

A basic program to encipher or decipher a chunk of text similar to enigma machine. The encipher text can then be send over SMS, WhatsApp, WeChat, LINE and even email. The same program can be used to decipher the message to produce output text. CLI binary available only

A descriptive explanation of using OpenSSL and setup the secure communication between server and client

Secure transport UDP protocol to guarantee secure communications

Example secure RSA communication between Unity and php using phpseclib

I can't remember OpenSSL invocations.

A simple WHMCS hook that checks if the client is using a proxy/VPN.

Collection Softwares & Services For Bypassing Internet Censorship and Protecting Privacy.

A Secure Socket Protocol based socket.

Mecanismos de proteção de dados e comunicações num serviço de reprodução de música, SIO UA 2020/2021

Securely file transfers a directory and its sub-contents encrypted over TCP/IP on peer-to-peer connection.

Simulation of a candy factory using network technologies

RetroShare is a Free and Open Source cross-platform, Friend-2-Friend and secure decentralised communication platform.

Unity Network is a virtual network (VPN) capable to be deployed in any kind of IP network as a LAN network or over the Internet. It is based on a divide and conquer logic with distributed roles, behavior and decupoled network traffic from the network logic which allows it to serve a large number of host-clients from many platforms.

PGP FileLock is a lightweight tool for encrypting and decrypting files using PGP standards. It provides a simple interface for generating PGP key pairs, encrypting files with public keys, and decrypting them with private keys. Designed for users who need quick and secure file encryption without the complexity of full-featured PGP software.

This repository contains lab exercises for the Computer Systems Security course at Universidade da Beira Interior, covering topics such as cryptography, authentication, access control, and secure communications.

Secure Chat Server is a Python-based application enabling secure communication between two clients. It supports RSA public key exchange, encrypted messaging, and optional SSL/TLS support for enhanced security. The server routes messages without accessing their contents and ensures secure key exchange and disconnection of additional clients.