What is the best way to encrypt on the client and decrypt on the server?

Question

PHP

Good day, dear gentlemen! I wondered if it is possible to encrypt a file / photo on the client using JS , send it to the server and decrypt it using PHP and save it? What are the options? Maybe there are ready-made packages / practices? Until this moment, I had absolutely no experience with cryptography...
Thank you all for any help!

Answer 1

Create public/private keys on the server. public you send to the client, with its help you encrypt everything. public was invented for that, that it could be given to anyone so that they could encrypt, but someone who only has a private key can decrypt. Actually, that’s all, take RSA as an algorithm, it’s the easiest with it, there’s a lot of information, there are a lot of libraries. But you can show off and come up with something of your own.