Here's an intro to Textile from 
We've been in private beta through the Fall and are getting very close to a public release. We wanted to invite Steem'ers to give it an early try though. Please keep in mind that it's Beta, the app is still changing a lot between each release. We also have a major migration planned in a week in order to get users a bunch of cool new features.
Brief overview:
- Textile runs an IPFS node directly on your mobile device
- Photos you add to the app will be privately encrypted with a key only you have access to, and hashed for IPFS.
- You can create Threads, which are small groups to share photos with, you all share a set of keys specific to the Thread.
- When you post a photo to a Thread, you share the photo key to Thread members so they can fetch it and view it.
Here's another technical post on our encryption: The 5 steps to end-to-end encrypted photo storage and sharing
If you are still interested, you can join me with the referral code, 'OCCER'
Just enter it after you download the app for iOS or Android.
Then, after you have the app up and running, click the following link from your phone to join my Steem Thread to test out sharing.
RE: Hi, Steemit! We're Textile. Here's a deeper look at the tech behind our Threads protocol.