Encryption libraries

I want to pick an open-source project for code libraries for encrypting data and messages. Below is a list from Open Source Everything (CC BY-SA 4.0), in the order its website shows it. The order is a starting point, not a verdict. - libsodium: Libsodium is a software library that provides tools for encrypting data, creating digital signatures, and hashing passwords securely. It is meant for programmers who build applications that need strong security. [Advanced setup; Windows; replaces fully; ISC; https://github.com/jedisct1/libsodium] - libsignal: libsignal is a set of building blocks that handle secure messaging and encryption, used inside Signal's own apps and servers. It is aimed at programmers who build or maintain Signal's software, and the project itself says outside use is unsupported. [Advanced setup; devices not listed; replaces fully; AGPL-3.0; https://github.com/signalapp/libsignal] - liboqs: liboqs is a free C code library that provides quantum-safe cryptographic algorithms, meaning methods designed to resist attacks from future quantum computers. It is aimed at developers who want to add these algorithms to their own software. [Advanced setup; Windows · Mac · Linux; replaces partly; MIT; https://github.com/open-quantum-safe/liboqs] Setup rating: "Easy setup" means you can install it like a normal app, use it in a browser. "Advanced setup" means you must run it on your own server or use the command line, or it is a tool for developers. Full details: https://opensourceeverything.org/data/groups/encryption-libraries.json Before recommending anything, ask me these three questions (one at a time, in plain words): 1) Which device or devices will I use it on (Windows, Mac, Linux, Android, iPhone)? 2) How comfortable am I with technical setup: only installing apps from a store, happy to follow a step-by-step guide, or comfortable with servers and the command line? 3) What is my budget: free only, or willing to pay for hosting or support? Then recommend one to three projects from this list only, and for each say why, using how fully it replaces the app, its setup rating, and the devices it runs on. If nothing on the list fits me, say so plainly instead of stretching.

Read the list of open-source projects at https://opensourceeverything.org/data/groups/encryption-libraries.json. Compare it with my project or idea below. Tell me which projects overlap, what I could reuse instead of rewriting, and what mine does that none of them do. My project or idea: