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mitmproxy
An interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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matrix-docker-ansible-deploy
🐳 Matrix (An open network for secure, decentralized communication) server setup using Ansible and Docker
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You can do the same thing for WhatsApp, and it has been done. It's not all that hard to analyze network traffic if you're somewhat tech-savvy. The additional TLS encryption layer can be stripped with a tool like mitmproxy and you will still see no plain-text message content after that (but probably some plain-text metadata). Of course truly verifying that it's the Signal protocol being used as opposed to something else encrypting or obscuring the message content is much harder than having a quick peek behind into the plain client-server communication data, but it is possible.
Source: https://signal.org/blog/private-contact-discovery/
Lets just say that since Matrix Ansible Deploy exists and its quite trusted. Like with this any jackass that has a few hours to burn can manage to set up a perfectly working Federated with the rest of the network matrix server. You dont even have to be good at linux to do it.
Signal (https://signal.org)