Two-Factor Key Generation (2FKG) process
Detailed Manufacturing Process
In USAIn China
1
1. Using an offline computer, a serial number, passphrase entropy, and an intermediate code are generated in Ballet’s USA headquarters.
2. Serial number and intermediate code are then electronically transmitted to Ballet’s office in China.
2
3. Afterwards, the BIP38 process is used to randomly generate a private key entropy using the intermediate code data.
- The corresponding public key and deposit addresses will be generated, along with a confirmation code, to be used for verification and additional checking afterwards.
- This private key entropy is secure data, which is only stored once, on a hard disk drive.
3
In China, this two-layer QR code sticker is manufactured using an offline process in a secure printing facility
- The secure data is never transmitted to any external computers or system.
- The secure data is transferred physically, on a hard disk drive.
- Right after the printing process, the secure data is then deleted, overwritten, and physically destroyed.
4
The secure two-layer QR code sticker will then be securely applied to the physical cold storages, without ever revealing the private key entropy.
- Once finished, the partially assembled cold storages are sent to the United States for final production.
- The confirmation codes are also electronically sent back to the United States.
- This is for further verification to ensure that the private key entropy and decryption passphrase entropy does match up with the generated cryptocurrency deposit addresses.
5
The physical cold storages and QR code stickers are verified and double checked in the United States according to their corresponding serial numbers.
- The matching decryption passphrase entropy and serial number will then be laser etched onto the cold storages.
- A strip of tamper evident scratch-off material is then applied on the cold storage, to cover the passphrase entropy.
6
