Mycelium Entropy 2 of 3 MultiShare wallet question

[krogoth]

 Wanted to utilize the multi sharim share wallet with 2 of 3 features.

  I was able to print the wallet and wanted to test it with $5 worth of BTC on it.

  I tried to sweep with a Mycelium hot app wallet and after I sweep the first priv key it asks me for the 2nd...when I do that...nothing happens.

  Anyone have any experience with this?

  Thankyou.

[1713495606]

1713495606

[1713495606]

1713495606

[1713495606]

1713495606

[Charles-Tim]

Your question is not that clear, Mycelium wallet is never a multisig wallet but can only create you a standard HD wallet. If you want to make use of multisig wallet, I will advice you to use Electrum.

Download it from https://electrum.org and make sure you verify its signature

[dkbit98]

I tried to sweep with a Mycelium hot app wallet and after I sweep the first priv key it asks me for the 2nd...when I do that...nothing happens.

I never tried multisig setup with Mycellium wallet, and I would suggest doing it first with testnet to see how it works and save on fees (if you have testnet bitcoin).
Bad thing about Mycellium (other than adding bunch of ads and altcoins) is the lack of documentation, help and their website is very poorly made.

Few months ago I made a list of wallets supporting Multisig, so you may try some of them as alternative, maybe Blue wallet if you prefer mobile wallets.

• Electrum wallet
• Armory wallet
• Green wallet
• Lily wallet
• Specter wallet
• Sparrow wallet
• Nunchuk wallet
• Blue wallet
• Caravan wallet

PS
I will try to test Mycellium multisig later, but I can't promise anything :/

[krogothmanhattan]

This is not from a mycelium hot wallet...this if from the Entropy Mycelium 

https://mycelium.com/mycelium-entropy.html


  And this is what it prints out..

 

[dkbit98]

This is not from a mycelium hot wallet...this if from the Entropy Mycelium  

So you do have this USB device or not?
Maybe you need to have this device for Mycelium Entropy multisig to work.
Error 1001 is showing for me when I tried to access their User Manuel page, and device is not available for selling anymore.
I would suggest that you contact Mycellium developers for help if they are still active.

You can use also Blue wallet on some old smartphone that is without sim card and not connected to internet, this would also act as a cold wallet.

[Charles-Tim]

This is not from a mycelium hot wallet...this if from the Entropy Mycelium 

That above address is p2sh address, can it generate p2wsh addresses? The reason I asked the question is that the fee for p2sh is much more higher if compared to p2wsh. I will recommend anyone that want to make use of multisig to make use of the later.

I will advice krogoth to also read about Taproot to take advantage of low fee. Just that I have been expecting Electrum to support pay-to-taproot but not yet supported. Probably it will be included in the next released version.

You can use also Blue wallet on some old smartphone that is without sim card and not connected to internet, this would also act as a cold wallet.

Electrum can be used on airgapped device which is a cold wallet in that way also.

[krogothmanhattan]

This is not from a mycelium hot wallet...this if from the Entropy Mycelium  

So you do have this USB device or not?
Maybe you need to have this device for Mycelium Entropy multisig to work.
Error 1001 is showing for me when I tried to access their User Manuel page, and device is not available for selling anymore.
I would suggest that you contact Mycellium developers for help if they are still active.

You can use also Blue wallet on some old smartphone that is without sim card and not connected to internet, this would also act as a cold wallet.

  Yes I have the device and have been usinhg it for years in making regular paper wallets...I love it!

  I just started experimenting with the 2 of 3.

  I have reached out to the developers but no response yet.

  Here is some info on p2sh https://www.bitgo.com/resources/content-library/p2sh-safe-address/

  

[DaveF]

Or, you could ask the person who you bought it from. They are a really nice guy who can help. :-)
It's not regular Multisig it's Shamir’s Shared Secret.
Dave takes an Advil since he pulled a muscle patting himself on the back.
Use: https://mycelium.com/assets/entropy/checksalt/sss.html     to decode it.

Note when entering the keys you need to start with the SSS-

-Dave

[krogoth]

Or, you could ask the person who you bought it from. They are a really nice guy who can help. :-)
It's not regular Multisig it's Shamir’s Shared Secret.
Dave takes an Advil since he pulled a muscle patting himself on the back.
Use: https://mycelium.com/assets/entropy/checksalt/sss.html     to decode it.

Note when entering the keys you need to start with the SSS-

-Dave

   Awesome...thanks!  Is there any wallet out there that can sweep this? The link is for a live site that can easily swipe any funds from the wallet.

   Thanks though regardless

[krogoth]

And it works... 

[DaveF]

You don't have to run the site while connected to the internet.
You can go to it and once it's loaded go offline
OR
You can open it in chrome, right click in the whitespace on the page and click save as and save it and all the files to a folder and copy it to an air gapped PC.
It will run from an offline computer, but it will complain a bit about not being able to get to some jQuery stuff.

-Dave

[krogoth]

You don't have to run the site while connected to the internet.
You can go to it and once it's loaded go offline
OR
You can open it in chrome, right click in the whitespace on the page and click save as and save it and all the files to a folder and copy it to an air gapped PC.
It will run from an offline computer, but it will complain a bit about not being able to get to some jQuery stuff.

-Dave

  Awesome and good to hear!  Thanks!

[dkbit98]

Or, you could ask the person who you bought it from. They are a really nice guy who can help. :-)

Are you saying that you are actually selling this devices, or I understood something incorrectly and some other person is selling them?

It's not regular Multisig it's Shamir’s Shared Secret.

Is this the same Shamir’s Shared Secret like we can see in hardware wallets Trezor model T or Keystone?
I never tried creating one of this schemes, and I think it has more flaws compared to multisig setup, including single point of failure.
It is probably still better than using regular singlesig without passphrase .

You don't have to run the site while connected to the internet.
You can go to it and once it's loaded go offline

It's something similar like with paper wallets websites... most people are using them while connected to the internet 

[DaveF]

Or, you could ask the person who you bought it from. They are a really nice guy who can help. :-)

Are you saying that you are actually selling this devices, or I understood something incorrectly and some other person is selling them?

No, I bought a few when the 1^st came out and wound up selling one to Krogoth. They are really neat devices, but for some reason never caught on.
I think the price was the main obstacle. You could get a "real" hardware wallet for what they were asking.

It's not regular Multisig it's Shamir’s Shared Secret.

Is this the same Shamir’s Shared Secret like we can see in hardware wallets Trezor model T or Keystone?
I never tried creating one of this schemes, and I think it has more flaws compared to multisig setup, including single point of failure.
It is probably still better than using regular singlesig without passphrase .

Yes it's the same in theory, I don't know how or how well the other devices do it. They *should* all work the same but as we all know should is not the same as do...

You don't have to run the site while connected to the internet.
You can go to it and once it's loaded go offline

It's something similar like with paper wallets websites... most people are using them while connected to the internet  

Or people keeping way too much money in non secure hot wallets or people putting their private keys in unknown websites.
You can lead people to knowledge, you can't make them think.

-Dave

[dkbit98]

Yes it's the same in theory, I don't know how or how well the other devices do it. They *should* all work the same but as we all know should is not the same as do...

It would be a good idea to ask Trezor/Keystone developers if their Shamir Secret is compatible with Mycelium Entropy or not.
Reason is that you have backup alternative option in case you lose Mycelium Entropy device, as I don't know what happens if you lose your device.

It looks like Mycellium also had an interesting blockchain based card payment device and I never got a change of testing it and seeing how it works.
Instead of using cryptocurrencies Mycelium card used some pegged digital tokens for payments.
This could be a nice collectibles item now.


https://card.mycelium.com/

[DaveF]

Yes it's the same in theory, I don't know how or how well the other devices do it. They *should* all work the same but as we all know should is not the same as do...

It would be a good idea to ask Trezor/Keystone developers if their Shamir Secret is compatible with Mycelium Entropy or not.
Reason is that you have backup alternative option in case you lose Mycelium Entropy device, as I don't know what happens if you lose your device.

It looks like Mycellium also had an interesting blockchain based card payment device and I never got a change of testing it and seeing how it works.
Instead of using cryptocurrencies Mycelium card used some pegged digital tokens for payments.
This could be a nice collectibles item now.


https://card.mycelium.com/

Does not matter if you loose the entropy or not. It holds nothing. It plugs into USB and generated addresses on the fly as images you can print. Once you remove it from the USB and it looses power those addresses are gone. It was designed to give one off paper wallets or if you wanted more security multi-sig paper wallets but no storage of wallets.

The cards as far as I know never made it into production, but I did not pay that much attention to them as it was not a product I was interested in.

-Dave

[HCP]

Awesome...thanks!  Is there any wallet out there that can sweep this? The link is for a live site that can easily swipe any funds from the wallet.

As far as I can tell... that isn't actually a "multi-sig" wallet... it's simply a standard bitcoin private key that has been split in a 2-of-3 Shamir Secret Sharing scheme.

Once you've decoded the final private key (ie. by downloading and running https://mycelium.com/assets/entropy/checksalt/sss.html offline), then you should be able to sweep the private key into any wallet that offers that functionality.