Public-Key Cryptography on the Web 🔐

Code: https://github.com/phartenfeller/public-key-cryptography-web

I did a small experiment where I checked whether you could create a signature with a private-key and validate it with the public-key in the browser. This can be used to validate authorities or lock features away. Keep in mind that JavaScript can be tempered on the client, so this is not suitable to "hide" sensitive content. Use server-side checks for that!

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Resources:
https://en.wikipedia.org/wiki/Public-key_cryptography
https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/verify

Timestamps:
00:00 About Public-key Cryptography
01:18 Plan / How should it work
02:17 Generate keys
03:15 Create signatures with private key and Node.js
04:37 Website that verifies signature
06:54 Warning: this is not suitable for sensitive checks