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 Device (cell scorching 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 organising the Gordian Seed Device and importing to Sparrow/exporting again to the seed instrument, I’ll deposit (the smallest quantity potential) 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 accurately. I wipe the unique chilly card and passport HWWs.
The seed plates for the two HWWs will likely be saved robustly at completely different bodily areas.
I’ll destroy the copy of the seed phrase for the gordian seed instrument.
I’ll then check spending the BTC on the pockets in 3 separate transactions (signing with all 3 of the potential 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 change into 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 threat) does not create a safety threat? 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 someway 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 could 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 wish to be sure that I am not capturing myself within the foot through the use of a extra refined setup than an ordinary chilly storage. In actuality I contemplate the prospect of constructing a mistake organising a multisig answer and exponentially extra likley risk than normal chilly storage turning into compromised.