1 out of 2 multi sig setup scenario with hidden public keys

[apogio]

That's a good question. A difference is that with 1-of-2 you don't need to deal with partially signed transactions, which might be a convenience with less experienced bitcoiners (like my heirs).

Instead of the 1-of-2 multisig, why don't you create a singlesig wallet and give them both the seed?

Essentially,

giving them each: one cosigner + the 2 xpubs provides no more security than
giving them each: one seed phrase of the same wallet

The reason is that in both cases you trust them with the same funds and each one is capable of restoring and emptying the wallet.

[hosemary]

The reason is that in both cases you trust them with the same funds and each one is capable of restoring and emptying the wallet.

OP said that the seed phrase A will be in location A, seed phrase B will be in location B and the master public keys will be in location C.
Therefore, if someone has seed phrase A/B and that's all they have, they will be still unable to spend the fund.

[alexeyneu]

The reason is that in both cases you trust them with the same funds and each one is capable of restoring and emptying the wallet.

OP said that the seed phrase A will be in location A, seed phrase B will be in location B and the master public keys will be in location C.
Therefore, if someone has seed phrase A/B and that's all they have, they will be still unable to spend the fund.

you know one of the two private keys and address of multisig.
you do  createrawtx after this dude


sign it with your key , broadcast it and funds are gone.
unlike previous moron who'd posted here before you you don't invoke first instruction via debug console inside multisig wallet so node wont append multisig redeem to rawtx

[nc50lc]

you know one of the two private keys and address of multisig.
-snip-
unlike previous moron who'd posted here before you.

Okay, please spend this. The transaction is in testnet4 chain.

UTXO:

Code:

c08b06bbab7ff574157ae9742c0e40accb0f7af08f9c9bbf64c4171e900d58e3:0

BlockExplorer link: mempool.space/testnet4/tx/c08b06bbab7ff574157ae9742c0e40accb0f7af08f9c9bbf64c4171e900d58e3

The only info that you need accodring to your claims:
1-of-2 MultiSig Address: 2N93HmEMoLTbfjhL2Z5UzD1DqdgtqT38ZX9
Single WIF Private key:  cP67EARPBse4wCieXA9JVsxzEK8ftveuPAZqqQ1ZHiCsApf2PJyf
Supporting Image:

[apogio]

OP said that the seed phrase A will be in location A, seed phrase B will be in location B and the master public keys will be in location C.
Therefore, if someone has seed phrase A/B and that's all they have, they will be still unable to spend the fund.

My bad, thanks for clarifying!

So yeah, the setups are not equivalent. Please ignore my previous recommendation!

[nc50lc]

https://explorer.bc-2.jp/tx/235bf9724ef3c97f3967c58ae9b75911c31905c0d2ff967d6178d9fa65f14afc?expand

Okay, you've spent the first output of this transaction... not the created transaction in the image.

So you acknowledged that you need the redeem script in signrawtransactionwithkey, otherwise the command will fail.
Plus the transaction contains the redeem script under Witness Field since it's P2WSH.

Before replying, please read my previous replies.