In a simple analogy, the correlation of Nano technology and Blockchain works like physical pictures with unique finger-print like signature is converted into immutable scrambled digital signal and transmitted through air wave to the unique receiver then de-scrambled back to the original physical picture, is that correct?

So in the future quantum world, shoppers' record associated with the identity of the purchasers, their purchase transactions and the authenticity of the products are stored in Blockchain with such a scheme and can be retrieved for verification. No signatures, sales slips or invoices will be needed. Same for business deals and monetary transactions.