Like most electronic devices, if stored properly, it should last decades. But if you are looking to a long-term cold storage for your crypto-currencies, we recommend you to use our hardware wallet: Satochip.

Satodime is a product made by Satochip.
Based on a smart card, it can be used to safely generate crypto wallets while private keys remain sealed in the secure chip.
It’s called a bearer crypto card.

Unsealing a keyslot means you ask the chip card to unveil the private key from its secure memory and display it in app.

Sealing a keyslot means you ask the chip card to randomly generate a pair of key for the selected blockchain and hide the private key within the chip’s secured memory.

Resetting a keyslot means you ask the chip card to completly reset the vault. You will loose all the information attached to this keyslot, including the public and private key. Be sure to empty the wallet and backup these informations prior to reset.

Your Satodime card is contact (chip) and contactless (NFC), you can use it with the Satodime-Tool software on your computer (#Windows/#Linux) or using our mobile app.
Satodime app (desktop or mobile) allows you to manage your card and easily set-up your crypto-vaults (aka KeySlots).

No, there is no password nor seedphrase. The physical holder of the card is the owner of the keys and can, at anytime, anywhere, unseal a specifi keyslot.

Yes of course! Address and key generation are done through a co-generated entropy. The user provides the first part while the rest is randomly generated by the chip.
It ensures the keys are not pre-generated during manufacturing.

You can see your Satodime card as a crypto vault. You can have up to 3 keyslots. Each keyslot corresponds to a #crypto wallet.
For each wallet, you have the public key and the address while the private key is sealed within the secure chip.

To give a Satodime to another user, you have to initiate transfer before to release the ownership.
Pairing is only checked on the NFC interface, accessing the Satodime through a USB card reader always provides full access.

When the keyslot is unsealed, the entropy used to derive the private key is revealed, allowing to verify that the key was generated randomly as specified.

You can’t. Just like you can’t backup a 10$ bill. If you lose your card, you lose your funds.

You can use up to 3 keyslots at the same time. Meaning you can store up to 3 different #cryptocurrencies using a single Satodime card.

The Satodime cards support the key generation for #Bitcoin, #Litecoin, #BitcoinCash, #Ethereum, the #ERC20 and #ERC721 (#NFT) tokens but also #CounterParty #XPC tokens. Many more to come soon…

Using the desktop or mobile app, you can clearly see the deposit address for each keyslot. Using the “More info” button, you will be able to copy/past the address or display a QR-code.

Address and key generation are done through a co-generated entropy. The user provides the first part while the rest is randomly generated by the chip.
It ensures the keys are not pre-generated during manufacturing.

First, you have to unseal the corresponding keyslot to be able to export the private key (in plaintext or WIF format). Import the private key using your favorite software wallet such Electrum or MyEtherWallet.

It includes a cryptographic mechanism that allows you to check whether the card is an authentic Satodime or not.
The authentication mechanism is based on a unique digital certificate issued for each card and verified with a trusted PKI.

You can see it as a way to physically gift #Bitcoin
Load some Satodime with various denominations of #Bitcoin and keep them in a safe for long term storage or to gift.
No need to care about a PIN code or a seedphrase. Seal it, load it and forget it.

You can see it as a physical #crypto bill and exchange it for fiat, goods or services.
You can buy a #Tesla for a 1 #BTC pre-loaded Satodime.
The dealer does no need to trust you as the private key of the wallet is safely store within the secure chip.

No, a Satodime is paired with a specific device on its first use.
Only the legitimate owner can perform sensitive operations such as unsealing and revealing a private key.

Your Satodime card is contact (chip) and contactless (NFC), you can use it with the Satodime-Tool software on your computer (#Windows/#Linux) or using our mobile app.
Satodime app (desktop or mobile) allows you to manage your card and easily set-up your crypto-vaults (aka KeySlots).

Yes, Satodime can handle your #NFT (#ERC721 and #XCP). Sealing a keyslot for a NFT will give you extra information like the contract address, the token ID, the NFT description along with a preview.

No, you can’t. But as you can provide part of the entropy used for the key generation, you can store a hidden text message.
This message will be revealed when the keyslot is unsealed, along with the private key and the chip-generated entropy.

You can safely let another person scan the Satodime with its smartphone, e.g. to check the balance.
If you want to physically give a Satodime to another user, you have to initiate transfer before to release the ownership.

Yes you can! Unlike the competitor’s product, you can actually reuse your Satodime card indefinitely.
Just follow this process: SEAL – UNSEAL – RESET – …

Your Satodime looks like a bank card but it’s not. You cannot use it to pay at the grocery.
But if the grocery store clerk accept #cryptocurrency, maybe you can give him/her a Satodime loaded with some #crypto.