I am wanting into organising a multisig setup utilizing Sparrow, and needed to see if anybody can discover any flaws in my arrange, and probably accessing my funds if I lose a key.
arrange = 2 of three
Key retailer 1 = Passport HWW
Key retailer 2 = Chilly Card HWW
Key retailer 3 = Gordian Seed Software (cell sizzling pockets)
I’ll arrange the Chilly Card and Passport as per the directions within the beneath video
https://www.youtube.com/watch?v=Gx0mke_4BJU
Seeds for these can be written onto a seed plate (one seed phrase per plate).
After organising the Gordian Seed Software and importing to Sparrow/exporting again to the seed device, I’ll deposit (the smallest quantity attainable) into the multisig pockets.
I’ll then restore the pockets utilizing all 3 seeds to a distinct chilly card and passport system, and import the pockets as a brand new pockets in Sparrow.
If the funds can be found within the pockets, I’ve the seed phrases all saved appropriately. I wipe the unique chilly card and passport HWWs.
The seed plates for the two HWWs can be saved robustly at completely different bodily areas.
I’ll destroy the copy of the seed phrase for the gordian seed device.
I’ll then take a look at spending the BTC on the pockets in 3 separate transactions (signing with all 3 of the attainable combos of the two of three key shops.) If I can full these 3 transactions I’m happy I’ve the flexibility to entry my BTC ought to any 1 of the three keystores turn out to be compromised.
My questions are
- is there any apparent flaw on this kind of storage setup?
and extra importantly
- the one different data I’ll want within the occasion that one among my keys turns into bodily compromised is the xpub/zpub of every of the three keys?
Moreover storing these xpub/zpubs collectively (while it might create a privateness danger) does not create a safety danger? e.g with every of the two seed plates I might retailer the xpub/zpub for ALL 3 KEYS on an encrypted SD card. If somebody in some way managed to achieve entry to a seed plate (extremely unlikely given the sturdy bodily arrange, however worst case), they might have entry to 1 of the three seed phrases, AND entry to all 3 xpub/zpubs? This might not give them entry to my BTC, and I might nonetheless have entry to it and will spend it (switch it to a different pockets) when it grew to become obvious one of many seed phrases might be compromised?
I simply need to be sure I am not taking pictures myself within the foot by utilizing a extra refined setup than a regular chilly storage. In actuality I contemplate the prospect of creating a mistake organising a multisig resolution and exponentially extra likley risk than commonplace chilly storage changing into compromised.
