I am trying into establishing a multisig setup utilizing Sparrow, and needed to see if anybody can discover any flaws in my arrange, and doubtlessly 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 Device (cellular 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 will likely be written onto a seed plate (one seed phrase per plate).
After establishing the Gordian Seed Device 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 gadget, 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 will likely be saved robustly at totally different bodily places.
I’ll destroy the copy of the seed phrase for the gordian seed device.
I’ll then check spending the BTC on the pockets in 3 separate transactions (signing with all 3 of the attainable mixtures of the two of three key shops.) If I can full these 3 transactions I’m happy I’ve the power 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 info I’ll want within the occasion that considered one of 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 threat) does not create a safety threat? e.g with every of the two seed plates I’d retailer the xpub/zpub for ALL 3 KEYS on an encrypted SD card. If somebody someway managed to realize entry to a seed plate (extremely unlikely given the strong 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’d 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 may very well be compromised?
I simply wish to be certain that I am not taking pictures myself within the foot by utilizing a extra refined setup than a regular chilly storage. In actuality I think about the possibility of creating a mistake establishing a multisig answer and exponentially extra likley risk than customary chilly storage changing into compromised.
