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1898 sats \ 15 comments \ @dustin 23 Mar 2023 bitcoin

Hey everyone! I wanted to share an app that I developed a couple of years ago for securely splitting and combining messages with Shamir's Secret Sharing Scheme (SSSS). It's available for both Android and iPhone, and you can download it from http://ssssmobile.app . At the time, the app didn't get much attention, but the conversations here lately make me feel like I may have found my apps niche. The app allows you to securely SSSS split your messages across multiple NFC tags or QR codes, which is great for anyone who wants to keep their messages private in a way that requires access to multiple physical objects.

Check out the demo here: https://youtu.be/Fpmy7nfQHZQ

I don't want to sound like an obvious ad or plug, but I'm really proud of the work that I put into this app and I think it could be useful for a lot of people. If you're interested, you can check out the website for links to the source code and more information.

Thanks for taking the time to read this, and I hope some of you find the app helpful!

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46 sats \ 3 replies \ @zeus 23 Mar 2023

This is impressive! I'll definitely give it a go. It'd be great to have the ability to get it from F-Droid as its my preferred source of FOSS apps.

30 sats \ 0 replies \ @xanny 23 Mar 2023

But use IzzyOnDroid's repo. The default one is super slow to push out updates.

25 sats \ 0 replies \ @mf 23 Mar 2023

My thoughts exactly. Bring it to F-Droid!

20 sats \ 0 replies \ @dustin OP 23 Mar 2023

Thanks, I'll look into what it will take to get it into F-Droid!

0 sats \ 0 replies \ @superstacker1 24 Mar 2023

Where can I find an APK of this app?

10 sats \ 0 replies \ @mooz 23 Mar 2023

Cool stuff (sent you some sats)!

It’s a pity that I didn’t come across your app before. I clearly see multiple applications for it: from extra password protection and crypto wallets to some sort of „last will“ or inheritance contracts.

Hope I can find a real application for it now.

10 sats \ 1 reply \ @nym 23 Mar 2023

What if Nostr implemented this for direct messages?

25 sats \ 0 replies \ @dustin OP 23 Mar 2023

That's an interesting idea. Are you thinking like a message would be split across multiple relays and then require someone to read from the same batch of relays? Would you want this because you believe that there is a danger of a malicious relay altering content?

10 sats \ 0 replies \ @mf 23 Mar 2023

https://media1.giphy.com/media/v1.Y2lkPTc5MGI3NjExZjYxMjJiMWYwM2VjOTg0NTI0ZmFjNjEyZmE1NmNjMWIzMDIzZGQxNCZjdD1n/sEJ2j80ZmgXPOlEYEt/giphy.gif

0 sats \ 2 replies \ @thrown 23 Mar 2023

does it follow this spec? https://github.com/satoshilabs/slips/blob/master/slip-0039.md

I’ve thought that NOSTR would be a great network to coordinate the messages because you can blast them out over 20 different relays for maximum availability

0 sats \ 1 reply \ @dustin OP 24 Mar 2023

No, it doesn't follow SLIP-39. This app doesn't have anything specific to mnemonic codes built in. My use case was more generic. I use the command line tool by B. Pottering ( http://point-at-infinity.org/ssss/ ) and wanted to be compatible with that. This app makes use of the ssss-js lib by Gabriel Berca: https://www.npmjs.com/package/ssss-js

It would be cool to tie in with nostr somehow.. not sure how that would work, though. Like is there really any expectation of a message's longevity on a relay?

0 sats \ 0 replies \ @thrown 24 Mar 2023

As of now, Relays don’t have guaranteed longevity. But SSS schemes don’t really plan on needing messages to be up form multiple years right? I thought stuff like data recovery happened in a matter of days in that system