I am trying into establishing 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 Instrument (cell scorching pockets)
I’ll arrange the Chilly Card and Passport as per the directions within the under 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 establishing the Gordian Seed Instrument and importing to Sparrow/exporting again to the seed software, 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 machine, 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 software.
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 flexibility to entry my BTC ought to any 1 of the three keystores grow to be compromised.
My questions are
- is there any apparent flaw on this form of storage setup?
and extra importantly
- the one different info I’ll want within the occasion that certainly 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 could 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 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 is able to 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 turned obvious one of many seed phrases could possibly be compromised?
I simply need to be certain I am not taking pictures myself within the foot by utilizing a extra subtle setup than an ordinary chilly storage. In actuality I contemplate the prospect of constructing a mistake establishing a multisig answer and exponentially extra likley risk than commonplace chilly storage turning into compromised.
