Customer Action
Customers utilizing Fortary’s self-custody MPC Platform, must have a dedicated iOS mobile device that is kept secure. THIS IS DIFFERENT THAN APPROVAL ROLE. We recommend 2-3 mobile devices. These mobile devices will store a portion of the wallet’s key material- and should be stored separately.Hardware Information
The Fortary Mobile App currently only supports iOS based devices We recommend the below These devices do not need a cellular plan. Fortary recommends customers to acquire their own iOS mobile device so that customers are always in control of their hardware security tools. But if customers want Fortary’s help to acquire this hardware please reach out to the team.Mobile Signing App Details
When utilizing a Qualified Crypto Custodian, the custodial platform is responsible for maintaining all key shares of a crypto wallet. When customers choose to self custody assets- customers must maintain a portion of their wallet’s key material. This ensures that the platform provider (Fortary) can never perform a transaction without the customer signing with their portion of the whole key. Fortary utilizes 3-of-3 MPC signing architecture. In this setup, 2 pieces of the key material will be stored in the MPC TEE nodes, while 1 piece will be stored in a TEE within the user’s dedicated mobile device. We call this mobile device with the key material the Signer Device. Fortary’s platform allows customers to store this key material utilizing Fortary’s mobile app on a dedicated mobile device. Be aware, for operational purposes, that a holder of one of these devices will be required to use this device to review and sign all blockchain transactions. The Signer Device that stores this key material should be treated with the utmost care and security. It should be on a dedicated mobile device that is stored securely and serves no other purpose. Fortary can provide recommendations regarding the secure storage of this device but it is ultimately up to the customer to secure their mobile device.Usage Summary
Dedicated Device
- Fortary highly recommends that customers have a dedicated device to store these keys. Not a device that is used for other activities/actions. The key material for your wallet is stored specifically on this device. It is not placed in cloud storage.If this device is lost or stolen- it is not a total compromise of your Fortary wallet, but it does make it vulnerable . The back up & recovery process must be invoked. This is why we recommend these be dedicated devices.
Multi-device set up
- Customers can have multiple Signer Devices. This helps with operational efficiency, so that there is someone available to sign for transactions. There is no risk of these signers with Signer Devices colluding because they possess the same key material and together cannot reconstruct the whole key.
Secure Storage
- When not in use, Fortary highly recommends storing the Signer Device securely. It should be accessible to utilize to review and sign transactions, but kept safe so that only the trusted holder can access it regularly.
Considerations for Owner/Holder of Device
- The Signer Device cannot currently be transferred to another device. If the holder of this device cannot access it for a transaction, then that transaction can’t be signed. Transferring ownership of the device will require physically handing off the Signer Device. Take this into consideration when selecting the owner(s) of the device(s).
- In the future, we will allow remote exchange of Signer Device’s ownership