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At Ledger Revcover’s core is Shamir’s Secret Sharing securely splitting your seed into 3 shards.
There is already a Ledger app that can do that for you but gives a bit more flexibilty on the number of shards and threshold you choose. 2-of-3, 3-of-5, 5-of-9, whatever. It also leaves you decide what to do with the generated shares. Store them on steel in different locations, whatever you want. Store then on PCs in remote locations too if you like.
The SSS algorithm used by the app is an open standard called SSKR which improves upon the SLIP-39 standard that Trezor use on ther devices.
And, the great thing is that it can all be done offline on your air-gapped ledger device with no seed leaving the device.
If you think that such an app is useful search for app-sskr-check on github.
Edit: The app has been submitted to Ledger