stacks

bitcoin

Verifiably secure dead drop to share bitcoin addresses and other secrets

Thanks for your feedback. However, Github Pages only allows static content as far as I know and I need a database in the background with some logic around it. Therefore, I don't see how this would add more security, right? As long as you can be sure that your secret has been correctly encrypted on the client side, it shouldn't matter that match if the storage server is trustworthy or not.

Fair point and thanks for your feedback! I have added an option to download a HTML file that you can open and use locally. That way you can be sure that the code does not change and you are always using the correct encryption. ;) Let me know if it works for you.

Hi guys

I built a little tool over the weekend I often felt I was lacking. I am often in the situation where I need to share a bitcoin address (or some other confidential info) with someone or even between different devices of my own. Logging in on different accounts, using secure send features of password managers or memory sticks is always tedious (and sometimes also insecure) and I needed a service where I can share a simple link that I can type manually or share via the phone, etc.

There are a couple dead drop websites that kind of do that but they are all a bit sketchy, so I built something myself. The gist is, your data is encrypted directly in the browser client-side using a standard browser library that most modern browsers support out of the box (which is verifiable if you check the source code of the web page). Therefore you can be sure that the server never receives any data in clear text. Only the recipient of your dead drop can decrypt it by using the password that you can share with the receiving party off-band. But don't trust, verify. Check the source code and also let me know if you see some weakness there or what you would improve.

The service is free. I am hosting it on a free provider for now as well so long-term support is to be seen. ^^

You can find the service here: https://cypherhub.onrender.com/

If you find it useful, leave me a donation :)