Show HN: I created a web app to encrypt/decrypt messages using Web Crypto API

[thiagosf]

https://webcrypto-private-messages.vercel.app

[yfw]

I did this a while ago as well for rsa vs aes implementations. https://yifeiwu.github.io/subtlecrypto-demo/

[thiagosf → yfw]

That's cool, thanks for sharing it.

[kristianr4s]

nice - have you considered using a websocket to push the message to the receiver instead of when the receiver posts a message back?

[thiagosf → kristianr4s]

Good one! I added some possible future improvements in the Readme.md, I'll add this one too. Thank you

[Rhapso]

How are the public and private keys generated and stored?

[hesus_ruiz → Rhapso]

Generation, signature, verification, and some more crypto operations are performed with the standard browser Crypto APIs (https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypt...).

Storage of the private key is another thing. For a web app it is difficult to acces a hardware-based storage system. So typically it is stored in Localstorage or IndexdedDB, encrypted using a user-provided password. It is possible (but very involved and I have not seen web apps using it) to use WebAuthn for that.

[thiagosf → hesus_ruiz]

I couldn't explain better, thank you !

[random_kris]

Very cool wanted to build something similar myself

[thiagosf → random_kris]

Nice! You can check my source code and create your implementation!

https://github.com/thiagosf/webcrypto-private-messages