Looks promising, I need to study it a bit more. Does it work only with encrypting single private keys? Or does it also work with seeds (HD wallets)?

Okay, so it sounds are comfortable with printing the xpubs. Unfortunately I am not.

I am also reluctant to store all the xpubs in the same place. I am not extra-paranoid, I just don't want to expose my addresses to the attacker for privacy reasons. Yeah, I know, no big deal, because I will find out that one of my backups was compromised in one of my regular health checks, but still, I want to avoid this.


This sounds interesting, gonna check it now. I was aware of it, but I never dived into it.

Well... Look, I understand that a 2-of-3 seems better and many people advise in favour of it.

However, I don't like it because I haven't found a way to properly backup the xpubs.

For those who read this, but don't know how multisig works, you basically need all the xpubs of all the cosigners to describe the wallet, but you need part of them to sign the transaction.

So:

2-of-3 : A, B, C - You need all the xpubs and 2 of the seed phrases

2-of-2: A, A, B, B: You need all the xpubs and the 2 seed phrases.

Let's back these up.

In the 2-of-2 you need 4 backups for the seed phrases but you don't need to backup the xpubs because they can be derived from the seeds.

In the 2-of-3 you need one backup of each seed phrase and one backup of each xpub.
You could do it like this:

Location 1: Seed A, xpub B
Location 2: Seed B, xpub C
Location 3: Seed C, xpub A

You have the same redundancy, because losing one location will allow you to have the necessary pieces to unlock the wallet (all the xpubs and the 2 seeds)

But, I haven't found a good way to backup the xpubs. They are huge sentences of random characters, so one simple mistake can lead to money loss.

This is why I avoid 2-of-3.


I understand. So, without giving away your setup, what do you think is a better way to do your self-custody ?

I had the 1.0.23 version and I upgraded to 1.0.29.
It works well so far, since yesterday. I have done a full test of my personal use case. I mean, I have imported the wallet using the QR code, I have signed a transaction, I have changed the colors and the brightness, I have performed a factory reset. All good!

So your biggest fears are

• Backup being destroyed by some unexpected event (fire, flood etc).
• Locking yourself out because you have lost / forgotten the backup of the wallet (or a piece of the backup).

Well in this occasion you are clearly looking for a multisig wallet.
The easiest way to go about it is:

1. Generate 2 wallets (A, B) with 12 words each. Generate them offline of course.
2. Create a dual backup for each wallet. So you will have the following backups: A, A, B, B.
3. Generate a multisig vault, offline. Set it up to be a 2-of-2 multisig where the cosigners are A and B. Create the vault in watch only mode, using the xpubs of A and B.
4. Send a small amount of funds to one of the addresses. Then try to send the amount of the wallet, signing offline with both the wallets. This will essentially test the wallet
5. Fund the wallet with your funds.
6. Save the backups A, A, B, B in 4 separate locations.
7. Check the locations once or twice a year, replacing the old paper with new ones.

So, now, you have eliminated both of your fears.

1. Its highly unlikely that the backups will be destroyed at the same time due to some flood or fire. In fact even if 2 of the 4 papers get destroyed you still have a chance to recover the wallet if the backups were not from the same wallet. Even if one of the backups gets destroyed you are perfectly fine.

2. You have great redundancy with this system. The wallet is safe because there is not a single point of failure. As I said, you can lose one of the backups. It's ok. You can even lose two and still have a chance to save the situation with a bit of luck.

Ok, let's narrow down the solution list. Shall we?
Firstly, can you put in order your biggest fears / threats?

• Thief finding the backup and stealing the money.
• Backup being destroyed by some unexpected event (fire, flood etc).
• Locking yourself out of the wallet due to some technical error (example: not being able to re-create a multisig vault properly).
• Locking yourself out because you have lost / forgotten the backup of the wallet (or a piece of the backup).
• Losing funds because of a hack (brute-force, malware, keylogger etc).

Add any other threat you want.

I am happy to tell you that my Jade looks ok now:



What I did, as I said above, was to re-flash the firmware using the browser.
So I went to this page: https://jadefw.blockstream.com/upgrade/fwupgrade.html (it's the same that fillippone mentioned above).
It worked perfectly, somehow...

Once again, thanks for trying to help me and thanks for all the suggestions.

Directly from BlockStream. In general, I would never buy a device that is supposed to hold secrets from a reseller. Even if you find reputable resellers, I will always choose the original manufacturer.

Hmm... thanks for the info.
The problem is, I own it for more than a year and I am also not in the US. So I need to cover the shipping fees, but also, it looks like they can't do anything for me.
Anyway, I will try to upgrade the firmware later tonight. Perhaps this issue will be solved.

Yes these thoughts are the obvious ones, I am having them myself too.
I don't use the Jade very much, so I don't really worry about using it, if I fix the issue myself.
I will follow the guide. Thanks a lot.

Thank you very much my friend. You are very helpful.
I will try something tonight and if it fails I will definitely contact Blockstream.

I will try to update the OS to the latest version using the browser. I don't know if I will be able to press anything on the Jade. If yes, then I will have a chance to fix it. If not, then there is no other choice than to contact them.

Sure thing.
So I just turned it on after one month that it had been idle.
It woke up like the picture above...
I don't remember doing anything wrong, or forgetting it turned on.
As I have already said a few times, I use it in a stateless mode.
The memory is always wiped and every time I use it, I scan a QR code and load the wallet in memory for a short period.

Hello @RickDeckard.

I have updated my vote in the corresponding thread, since PytagoraZ decided to withdraw their participation. I wanted to do it anyway because I have seen some bad trust reviews on him. This is irrelevant though.

What I wanted to ask is if it's ok to change the vote, like I already did. If it's not, let me know. I guess it will be fine though.

Συμφωνώ και πάλι. Όμως το πρόβλημα έγκειται στην περίπτωση που ο έμπορος δεν ενδιαφέρεται για το BTC / XMR σαν asset ή electronic cash, αλλά τον ενδιαφέρει να δώσει στον καταναλωτή μια extra επιλογή, με σκοπό όταν λάβει τα crypto να μπορεί να τα αλλάξει σε EUR. Νομίζω ότι είναι μεγάλη μερίδα εμπόρων αυτή.

Συμφωνώ απολύτως.
Ωστόσο, αντιλαμβάνεσαι ότι κάθε έμπορος, μπορεί να δεχτεί "τραμπουκισμο" σχετικά με το monero πχ.
Σε αυτό το επίπεδο, αν φοβησουν τον έμπορο, είναι πιθανό να μην δεχτεί πληρωμές σε XMR ή BTC.
Αν πχ ένας έμπορος φοβάται ότι δεν θα μπορέσει να μετατρέψει τα έσοδα του σε FIAT, τότε νομοτελειακά, δεν θα αποδεχτεί crypto σαν μέθοδο πληρωμής.

Όχι φυσικά. Αυτή είναι "καλό παιδί". Παίρνει τα λεφτά του κόσμου, οπότε βοηθάει τις αρχές να ξέρουν ποιος άνθρωπος έχει βάλει πόσα λεφτά. Ταυτόχρονα, κρατούν πλήρως KYCed Bitcoin άρα οι αρχές ξέρουν ότι X bitcoins ανήκουν στην τάδε εταιρεία. Άρα έχουν τη γνώση - έλεγχο.

Well yeah I am not doing that, at least not intentionally.

Have you spotted this happening from people from signature campaigns? Since we are honest here, there are mainly two reasons for this:

1. Users from signature campaigns want to reach their post limit to get max payment.

2. Newbies who want to get merit and go up in ranking faster.

(3. Spammers - but this is not too common. Most of the time spammers just spam with random posts, not with answers that have already been mentioned.)

Not only is it inverted, but it's also covering a small part of the screen. The other half is greyish.

I just turned it on after a month of it being idle and that's what I saw. I tried to charge it, but no luck... I will leave it open till it turns off and then I will charge again, in case it fixes.

I don't think it's under warranty. I don't care too much about it. I use it, but I can leave without it.

I just thought it was a good time to try something fancy, like installing a custom OS etc.

Hi guys!

So, my Jade is officially dead, unfortunately!



I think about using the hardware to re-flash the software from Github. Do you think that's possible?

Since this topic is "Jade DIY", I thought it was the best place to ask this question.

Ακόμα κι αυτό, κέρδος είναι για αυτούς.
Άλλωστε φαίνεται να έχουν αποδεχτεί πως δεν γίνεται να ελέγξουν το Bitcoin, αλλά γίνεται να προσπαθήσουν εκβιαστικά να "πνίξουν" τους χρήστες του, μετατρέποντας σε παρανομία την νόμιμη χρήση.

Εγώ, προσωπικά, πιστεύω πως ο στόχος είναι διττός:
1. Τρομοκρατία των ιδιοκτητών καταστημάτων, προκειμένου να μην μπορούν να χρησιμοποιήσουν BTC σαν hard cash.
2. Προπαγάνδα στον κόσμο ότι όλοι όσοι έχουν BTC, είναι άνθρωποι που το έχουν αποκτήσει παράνομα.