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JuBiter Blade

latest release: ?? last analysed  8th September 2021 No source for current release found 
1st November 2018

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Please help us spread the word discussing transparency with JuBiter Blade  via their Twitter!

Do your own research!

Try out searching for "lost bitcoins", "stole my money" or "scammers" together with the wallet's name, even if you think the wallet is generally trustworthy. For all the bigger wallets you will find accusations. Make sure you understand why they were made and if you are comfortable with the provider's reaction.

If you find something we should include, you can create an issue or edit this analysis yourself and create a merge request for your changes.

The Analysis 

JuBiter Blade is a credit card sized device with buttons and screen that connects via bluetooth to the companion app.

On mobile, these companion apps are JuBiter Wallet 2.0 - Secure Hardware Crypto Wallet Defunct!  and JuBiter Wallet 2.0 No Source!  .

The Android app is not available since 2021-09-06 so it’s not clear if they are still in business.

Apparently there was an issue with their firmware so they urged people to update it:

3 days ago

Therefore, please update the MISC application (version 1.0.05) in your device to the latest version (1.1.08) …

“3 days ago” would be 2021-09-05 but changing our system date to August and reloading the page gives us the same “3 days ago”, so it’s not clear from when this warning or the firmware update would date.

Their desktop companion app (available only for Windows) was last updated more than a year ago, on 2020-07-01.

Anyway, as there is no source code to be found for any part of the stack, this product is not verifiable.

(ml, lw)

Verdict Explained

Without public source of the reviewed release available, this product cannot be verified!

As part of our Methodology, we ask:

Is the source code publicly available? If not, we tag it No Source! 

A wallet that claims to not give the provider the means to steal the users’ funds might actually be lying. In the spirit of “Don’t trust - verify!” you don’t want to take the provider at his word, but trust that people hunting for fame and bug bounties could actually find flaws and back-doors in the wallet so the provider doesn’t dare to put these in.

Back-doors and flaws are frequently found in closed source products but some remain hidden for years. And even in open source security software there might be catastrophic flaws undiscovered for years.

An evil wallet provider would certainly prefer not to publish the code, as hiding it makes audits orders of magnitude harder.

For your security, you thus want the code to be available for review.

If the wallet provider doesn’t share up to date code, our analysis stops there as the wallet could steal your funds at any time, and there is no protection except the provider’s word.

“Up to date” strictly means that any instance of the product being updated without the source code being updated counts as closed source. This puts the burden on the provider to always first release the source code before releasing the product’s update. This paragraph is a clarification to our rules following a little poll.

We are not concerned about the license as long as it allows us to perform our analysis. For a security audit, it is not necessary that the provider allows others to use their code for a competing wallet.

The product cannot be independently verified. If the provider puts your funds at risk on purpose or by accident, you will probably not know about the issue before people start losing money. If the provider is more criminally inclined he might have collected all the backups of all the wallets, ready to be emptied at the press of a button. The product might have a formidable track record but out of distress or change in management turns out to be evil from some point on, with nobody outside ever knowing before it is too late.