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The Solo is your physical crypto account.

However, the secret codes are engraved in the metal instead of printed on paper or labels.

Solo has two codes that together allow you to recompute the private key. Nobody, even at COINPLUS, has ever had access to both codes. We have implemented the process to engrave and verify both codes separately.

The crypto-asset can be easily redeemed using our mobile phone app.


Our creation process ensures that at no time, one person or one computer had access to the full private key.

We first generate and engrave on the Solo a secret code which is covered by a tamper-evident hologram. An external company then generates and engraves a second code which is also covered by a tamper-evident hologram.

The address of the crypto-asset is then computed using Elliptic Curve Cryptography (ECC).

The private key, which unlocks the Crypto-asset, is only computed by the customer when combining both secret codes.

This process is similar to 2FA physical bitcoins, or to BIP38 private keys, but without the risk of losing your password.

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You can buy Solo in steel, silver or gold and in bitcoin or ether as of today. Please contact us for more information on availability.

When you buy the Solo, it is not loaded. To store Crypto asset on your solo, you will need to send your Bitcoin or Ethereum to the address displayed on your Solo.

For details, either ask our sales department or refer to our terms of sales.


The redeem crypto-asset from the Solo, first remove both security holograms. It will reveal two secret codes.

Enter both secret keys in the Coinplus application on your mobile phone (Android or iPhone). The app will request a destination address, and once you confirm, the transaction will be published on the network.

COINPLUS also provides the algorithm to compute the private key, so that you can implement your app.

WARNING: Do not show the private keys which are under the holograms to anybody. Be advised that if someone sees or records these private keys, he will be able to use your crypto assets.