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Show HN: I created a web app to encrypt/decrypt messages using Web Crypto API
  • yfw
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  • 10 months ago
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I did this a while ago as well for rsa vs aes implementations. https://yifeiwu.github.io/subtlecrypto-demo/
That's cool, thanks for sharing it.
nice - have you considered using a websocket to push the message to the receiver instead of when the receiver posts a message back?
Good one! I added some possible future improvements in the Readme.md, I'll add this one too. Thank you
  • Rhapso
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  • 10 months ago
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How are the public and private keys generated and stored?
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.

I couldn't explain better, thank you !
Very cool wanted to build something similar myself
Nice! You can check my source code and create your implementation!

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

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