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I am posting this to establish prior art for a manufacturing related cryptographic blockchain technology application to place it in the public domain and prevent the patenting of it.
An application for cryptographic blockchain technology is supply chain management and counterfeit prevention. Counterfeiting of serialized products is essentially a double spend problem, where either a counterfeit has a serial number which was never used, or a duplicate number of a legitimate product. Blockchain technology can solve this problem.
A manufacturer would create a key pair for each serial number, a public code for the serial number which is entered on the blockchain and a private validation code to be sent separately to the buyer. The public serialized code is printed as a QR or RFID code on the product.
The recipient of the product would receive an encrypted list of the private validation codes for the products separate from the shipment. Only the intended recipient can decrypt the list of validation codes. When the parts are scanned for validation to check the QR or RFID public codes against the validation codes, a new set of private validation codes are generated and the blockchain is updated to reflect the change in ownership of the parts.
If the parts are resold, the validation codes are sent to the new owner. If the parts are used in another product, that product is serialized with its own pair of codes and has a record of codes of the components which are used in it, entered into the blockchain as well. At any time, the owner of a product can audit the assembly by scanning the QR and RFID codes and comparing against the validation codes received from the vendor.
To streamline process flow, encrypted groups of validation codes can be encrypted and stored on the blockchain as a single transaction, decipherable only by the recipient of the shipment, then split and re-entered as needed for resale, internal distribution, or use in other products.
This system would both protect users against counterfeit products, validate the integrity of parts used in the product, and provide proof of ownership of a product by the current holder of its current private validation code.
A blockchain mobile device app and, if needed, attached RFID reader, can be used to validate products. With our specialty at Bitseed - embedded blockchain technology running on ARM based devices, dedicated marking equipment and high speed validation scanners can be made for volume applications for manufacturers, supply depots, and customs inspection.
Factom looks ideally suited for this application of blockchain technology. I am also working with a next generation crypto project, Crypti, which includes a scripting language embedded in the blockchain for uses like smart contracts. Crypti has custom blockchains secured by the main Crypti chain, runs on node.js, uses Delegated Proof of Stake for fast 10 second transaction processing, uses less than 512 MB RAM, and is running on our ARM based blockchain box. This would also be ideally suited for supply chain management.