I am wanting into organising 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 Software (cellular 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 probably 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 accurately. I wipe the unique chilly card and passport HWWs.
The seed plates for the two HWWs will probably be saved robustly at totally 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 power 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 kind 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 might create a privateness danger) would 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 one way or the other managed to realize entry to a seed plate (extremely unlikely given the strong bodily arrange, however worst case), they’d 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 wish to ensure that I am not taking pictures myself within the foot through the use of a extra refined setup than a typical chilly storage. In actuality I take into account the possibility of constructing a mistake organising a multisig resolution and exponentially extra likley menace than normal chilly storage turning into compromised.