AN OFFLINE TOOL
FOR THE ARDOR PLATFORM

Designed to keep your passphrase safe by letting you sign transactions, create tokens, and perform other tasks on any Ardor child chain in an offline environment

DOWNLOAD

FEATURES

Cold Storage Accounts Print and save paper wallet Securely sign any transaction with SIGBRO Offline (air gap) Generate a token from your passphrase to prove account ownership Generate QR code for any account Set up the SIGBRO Mobile App Cold Storage Accounts Print and save paper wallet Securely sign any transaction with SIGBRO Offline (air gap) Generate a token from your passphrase to prove account ownership Generate QR code for any account Set up the SIGBRO Mobile App

How to install and set up the SIGBRO app on Android

TUTORIALS

How to download and verify How to import an existing account How to create a cold storage account with SIGBRO Offline How to set up SIGBRO Mobile How to prepare a transaction using a public Ardor node How to sign transactions offline How to broadcast a signed transaction from Nxter.org How to generate a QR code for any account How to generate a token from your passphrase How to download and verify

Download HERE 

Unzip the downloaded file

Drag the ardor.html fil into this online tool and look at the checksum.

SHA-256 should be:
b1672f815c88682190508b3948f80301d59fec290bccecfdc53e407be0d70c8d ardor.html

Verify the SHA256 match to make sure you are not using a malicious program:

How to import an existing account

Open SIGBRO Offline by clicking ardor.html

SIGBRO Offline will open in a new browser window.

Click ‘I have an account’

Type or paste in your account passphrase

Click ‘Show’ 

How to create a cold storage account with SIGBRO Offline

Open SIGBRO Offline by clicking ardor.html

SIGBRO Offline will open in a new browser window.

Click ‘Create New’

Print your paper wallet. ALWAYS keep the private part of it safe and offline. Do not lose it!

Send an outgoing transaction with SIGBRO Offline OR include your public key in a transaction to the account.

How to set up SIGBRO Mobile

Print your paperwallet with SIGBRO Offline.

When the SIGBRO Mobile app asks for your passphrase, simply scan the QR code.

How to prepare a transaction using a public Ardor node

Visit ardor.nxter.org.

Sign in with your account ID, not your passphrase.

Prepare the transaction you want to make.
NOTE that you can not use SIGBRO Offline to send Prunable Messages! For this, you need the SIGBRO App.

Instead of signing the transaction with your passphrase, click ‘Advanced’ and tick “Do not Broadcast” and “Do not Sign“. 

Click the “Submit” button. 

Save the Unsigned Transaction Bytes, for example on a USB stick.

How to sign transactions offline

Open SIGBRO Offline on a device that is not connected to the internet.

Enter your passphrase into SIGBRO Offline

Paste the Unsigned Transaction Bytes into the form field

Click ‘CHECK’ to see your transaction details – verify them!

Once verified → Click ’SIGN’.

Save your SIGNED Transaction Bytes, for example on a USB stick.

How to broadcast a signed transaction from Nxter.org

On an ONLINE device, open https://nxter.org/wallet.

Paste your SIGNED Transaction Bytes into the form field and click ‘BROADCAST’.

NOTE that to make transactions on any Ardor child chain, like Ignis, AEUR, or Bitswift; select ARDOR.

How to generate a QR code for any account

Paste in the account ID.

The QR code will automatically be generated.

How to generate a token from your passphrase

Enter your passphrase

Enter the text you want to sign

Click ‘SIGN’

Copy the token and paste it anywhere to display confirmed ownership of your accounts 

FAQ

Why SIGBRO?

Jelurida maintains and develops an Ardor wallet.

It’s cool. It’s translated. And all chains and platform features can be accessed from the GUI.

What is NOT so cool is that users must download and install this client-server software (and java) to use the platform. Unless you own ARDR and want to forge or bundle child chain transactions, it’s an unnecessary pain. Therefore the Nxter team developed SIGBRO. Child chain users should USE the network, and not run it, only ARDR secures the network.

 

Why blockchain?

Because your passphrase never sees the internet. 

Can I contact you? Will SIGBRO Offline work with NXT?

No, SIGBRO is developed for the Ardor blockchains.

If you need a similar tool for the Nxt blockchain, you can have it here: https://nxter.org/nxtbridge-offline

How does SIGBRO work?

SIGBRO saves your passphrase locally on your mobile device.

It never leaves your phone.

When you create an unsigned transaction, you prepare the Unsigned Transaction Bytes/json to be signed. Unsigned is the keyword here. The Unsigned Transaction Bytes/json hold all the information about your transaction – except the part it needs to send it: your final approval, which is the private account passphrase.

So, a transaction is prepared but isn’t signed. No passphrase is ever involved, no private key exposed to any website, any online node, any server, or the internet. It doesn’t even matter if the website or node your use to prepare the transaction on is malicious.

All the transaction information is put into a QR code.
Again – no passphrase has been involved, so it doesn’t matter if an eeeevil hacker sees it.

Now you scan this QR code with SIGBRO Mobile.

SIGBRO shows you the transaction details. Check them. If everything looks like it should, well, the website or node you used to generate it must be ok. You can now sign the transaction, tapping your 6-digit PIN code into SIGBRO, and broadcast the signed transaction. Again, your passphrase is not sent, only the Signed Transacion Bytes/json, and no one can derive your passphrase from that. Safe. That’s what SIGBRO is about.

 

How is SIGBRO Offline secure?

Because your passphrase never sees the internet. 

Can I use this online? Is SIGBRO Offline open source software?

Understanding blockchain

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