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eSignus Hashwallet Link

🔍 Last analysed 8th November 2022 . Bad Interface
8th October 2022

The design of the device does not allow to verify what is being signed!

As part of our Methodology, we ask:

Can the user verify and approve transactions on the device?

If the answer is "no", we mark it as "Bad Interface".

These are devices that might generate secure private key material, outside the reach of the provider but that do not have the means to let the user verify transactions on the device itself. This verdict includes screen-less smart cards or USB-dongles.

The wallet lacks either an output device such as a screen, an input device such as touch or physical buttons or both. In consequence, crucial elements of approving transactions is being delegated to other hardware such as a general purpose PC or phone which defeats the purpose of a hardware wallet.

Another consquence of a missing screen is that the user is faced with the dilemma of either not making a backup or having to pass the backup through an insecure device for display or storage.

The software of the device might be perfect but this device cannot be recommended due to this fundamental flaw.

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.

Help spread awareness for build reproducibility

Please help us spread the word discussing build reproducibility with eSignus Hashwallet Link  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 

Product Description

The HashWallet Link is included in the latest update for a different product, the HASHWallet Link Bad Interface! indiegogo project. There are production and shipping delays with the HashWallet Indiegogo.

The Hashwallet Link has two versions, Silver and Cobalt. Apart from the significant difference in price, they are technically similar.

  • NFC-enabled
  • It is claimed that it is BIP-39 compliant, however, 12-24 seed phrases are not provided.
  • Compatible with Simplex and Changelly
  • Requires HashWallet Manager App
  • Secure Element: Infineon SLE78

Although we are compatible with BIP-39, you won’t need to worry about writing down 24 words and keeping them safe. If you lose your HASHWallet Link, no one will have access to your keys, and there is no way to perform any transaction. Your assets are always safe.

Just order a duplicate of your HASHWallet Link through your HASHWallet Manager App, and you will receive a new card with one of the recovery elements of your keys that were stored offline. Once you scan the card, you will download the other recovery element from your backup account (encrypted with zero knowledge technology), and the keys will be regenerated inside the secure element.


The card does not have a display or interface which would allow the user to verify or confirm transactions.