Quote from: frogx on Today at 12:07:03 AM

Is it possible to make a multisig address with 4 keys (A, B, C, D) that requires 2 signatures to broadcast a transaction, but one of the signatures MUST be from A?

Sorry if this has been answered before.

If I get you correctly you want to have 4 keys and during a transaction key A must sign, I would say there isn’t such a set up because every key on a multi sig actually holds the same capacity as the other. Moreover in a 4 keys set up more than 2 signatures would be needed for better security purpose.

Quote from: hosseinimr93 on Today at 12:42:00 AM

You want to have a wallet in which transactions can be made if they are signed by person A and one of B, C and D. Is this what you are trying to achieve?
If so, you can create a 4 of 6 multi-signature wallet in which the keys are A1, A2, A3, B, C and D. (A1, A2 and A3 are all owned by one person.)

This will actually be a good setup with an increased number of n, more co-signers (m) will be needed. But my problem in this case now will be having to back up all this keys and seeds. With A1, A2 and A3 being with just one person, that is he will have to back 3 keys and 3 Seeds. The more the number of these are there to back up the more I think it is easier to find at least one of them. If these 6 things are dispersed in different location (which is ideal for security reasons) then should the other three key (B, C and D) gets hold of one of these then they co sign in.

I feel a lesser m-of-n will be better if one person would hold two or more keys for backup case