Satodime — Why and how to use your bearer crypto card

Satodime — The bearer crypto card.

Table of content

  1. Introduction
  2. Usecases
  3. Prerequisites
  4. Create a new vault == SEAL
  5. Store your cryptocurrency == LOAD
  6. Check the balance and the state == VERIFY
  7. Retrieve the private key == UNSEAL
  8. Wipe out the vault == RESET
  9. Conclusion

Introduction

According to the website, Satodime is a bearer chip card that allows you to exchange crypto assets like any banknote. Safely pass it along multiple times thanks the secure chip, unseal anytime with ease. Trustless, easy to verify and completly secure.

Usecases

To show you the potential of Satodime, let’s dive into some use cases:

Satodime allows you to buy goods.
Satodime allows you to buy goods physically.
Satodime allows you to exchange NFT physically.
Stacking sats with your Satodime.
Stacking sats with your Satodime.

Prerequisites

Ok, how to do it?

  1. Optionally: grab a chip card reader to be able to setup your Satodime on your computer.
  2. Download and install the Satodime-Tool, the all-in-one application that will allow you to create and manage wallets/vaults within your card:

Create a new vault = SEAL

In this example, we will create a Bitcoin vault in our Satodime. While running the Satodime-Tool, you will see that you can create up to 3 vaults using a single card. Meaning you can store up to 3 different cryptocurrencies.

  • Litecoin ($LTC)
  • Bitcoin Cash ($BCH)
  • Ethereum ($ETH)
  • The ERC-20 and ERC-721 tokens (NFT).
Satodime-Tool — Interface.
Satodime-Tool — Interface.
Seal key! will open a new menu.
Seal key! will open a new menu.
Satodime’s entropy is co-generated by the user and the chip card.
Satodime’s entropy is co-generated by the user and the chip card.
Specify the asset and coin type.
Specify the asset and coin type.
Satodime — Seal a new vault. A new wallet will be generated.
Seal a new vault. A new wallet will be generated.

Store your cryptocurrency == LOAD

You have now created a Bitcoin wallet. The Satodime-Tool allows you to get the public information of this freshly generated wallet.

Satodime — The vault #0 aka “Key #0” is in a “Sealed” mode.
The vault #0 aka “Key #0” is in a “Sealed” mode.
  • The public key (PubKey) of the wallet;
  • The asset type : ‘Coin’, ‘Token’, ‘ERC20’, ‘NFT’, ‘ERC721’;
  • The blockchain used for such wallet;
  • And the addresses.
Satodime — Details tab for keyslot #0
Details tab for keyslot #0
Satodime — QR code of the freshly generated Segwit Bitcoin address
QR code of the freshly generated Segwit Bitcoin address

Check the balance and the state == VERIFY

Each keypair is generated inside the secure chip and can be in any one of 3 states at any time:

  • Sealed: the keypair has been generated securely inside the chip;
  • Unsealed: the private key has been revealed.
Satodime — An example of the different Keyslot status.
An example of the different keyslot status.
Green == SAFE — The private key is not known by anybody.
Orange == UNSAFE — The private key is known by someone.

Retrieve the private key == UNSEAL

If you want to retreive the private key of a specific keyslot, you can unseal the keyslot at anytime. This action is not reversible.

Unsealing a keyslot will ask the secure chip to expose the private key.
Satodime — Warning message that explains the private key exposure.
Warning message that explains the private key exposure.
An unsealed Bitcoin vault.
An unsealed Bitcoin vault.
Details about an unsealed keyslot.
Details about an unsealed keyslot.

Wipe out the vault == RESET

One of the big advantage of your Satodime bearer crypto card is that you can reuse it indefinitely. For a given keyslot, the transition between status follows always the same cycle: ‘Uninitialized’ => ‘Sealed’ => ‘Unsealed’ => ‘Uninitialized’ => … This is huge, right ?

Press the reset key button to wipe out the wallet.
  • The private key
Warning message about the keyslot reset process.
Satodime main menu.
Satodime main menu.

Conclusion

There is nothing like Satodime on the market!

  • Multi-vault: you can generate up to 3 different vaults. It allows you to manage multiple private keys at once. For example, you can safely store some Bitcoin, some Ethereum and your favorite shitcoin in one single Satodime bearer crypto card. The Satodime supports the MainNet and the TestNet coins and tokens.
  • Secure: your Satodime is not only a storage device. It embbeds an EAL6+ certified smart chip that acts as a secure element (SE) to handle your keys (public and private) with care. Thanks to cryptography, your privates keys and sensitive information are safely isolated within the secure chip and never leave it.
  • Trustless: private keys are stritcly sealed within the secure chip. You don’t know the keys until you redeem the key slot. The color of the key slot turns from green to red when it’s unsealed. Just like a fiat bill, it has never been so easy to safely transfer cryptocurrencies hand-to-hand.
  • Reusable: no need to break the device to use it again. You can redeem the private key and reset the vault again and again.
  • Customizable: just like the Satochip hardware wallet, your Satodime card can be customized to fit your need. You can, for example, print your favorite #NFT on your Satodime and load it. Amazing!

More information about Satodime

💮 Join us on Telegram
🐦 Join us on Twitter
👾 Check out our website
🔨 Take a look at our GitHub

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Satochip

Satochip

Open source and affordable hardware wallet on smart card. More information on https://satochip.io — Follow us on Twitter : @SatochipWallet