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

10 comments

• yfw a year ago

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

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  • thiagosf a year ago

    That's cool, thanks for sharing it.

• kristianr4s a year ago

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

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  • thiagosf a year ago

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

• Rhapso a year ago

  How are the public and private keys generated and stored?

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  • hesus_ruiz a year ago

    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.

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    • thiagosf a year ago

      I couldn't explain better, thank you !

• random_kris a year ago

  Very cool wanted to build something similar myself

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  • thiagosf a year ago

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

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

• brody_slade_ai a year ago

  [flagged]