Secure Encrypted Chatting Platform Development

This is a chatting website I called "Encrypted". It's a project I've spent less then 24 hours working on. Is it fully secured? Not yet due to this only being a project to display to you so you can understand somewhat of what I can do... (Budget: $10 - $30 USD, Jobs: Backend Development, Database Management, Encryption, HTML, JavaScript, MySQL, PHP, Python, Web Application, Web Development)