Editing Cross-platform finance (section)

==Platform money==
Quantum networks is one of the many transformations that the banking industry is experiencing. Another important transformation is that money is turning more and more into a purely digital asset. Beyond the mathematical challenges regarding the security of those digital assets, there is a deeper question on how to maintain trust in this new situation. Once again, cryptography can help to bring trustfulness to end-users. Two paradigms epitomize the digital transform of financial assets: platform money and blockchain.

In the digital world, supply and demand are handled by digital platforms. While their original role was to manage the multitude of users and data, the services they offer have widely diversified over the last twenty years. Platforms like Amazon, Microsoft, PayPal or Facebook are building ecosystems rather than just servicing customers.

With this respect, it is not surprising that Facebook announced in June 2019 that it was working on its own money, Libra. Although this project has not been deployed yet, this is a trend that banks are looking at seriously, trying to anticipate what their role will be in such an economic environment. It is clear that a systemic bank is also building an ecosystem rather than servicing customers. Anticipating changes for such institutions means they should understand not only their business, but also what their main values are. What is the value of a systemic bank in a quantum world?

Quantum technologies are an opportunity for banks to push further the trust relationship with their customers. As we mentioned, cryptography can be used to build trust between users of digital systems, which explains its wide adoption by the financial sector. In fact, systemic banks are more than financial operators. They also establish a deep trustful relationship with their customers. We trust banks to keep our money stored in their vaults, and to ensure the stability of the world’s economy.

In a world of platform money, banks would have to maintain and expand this trust relationship to platforms. The strong security guarantees of quantum money and quantum digital signatures could be an asset to establish trustful relationship between platforms.