Blockchain hitting the travel industry

While best known for underpinning bitcoin and other alternative currencies, blockchain holds promise for changing how transactions are handled in many industries.
 The Singapore Airlines technology is its own private blockchain involving only merchants and partners, it said in a statement.
 Both German airline group Lufthansa and Air New Zealand last year teamed up with Switzerland-based start-up Winding Tree to build blockchain-based travel apps as the companies look at new ways of distributing tickets and services to customers. 
 European travel group TUI has also developed its own blockchain-based inventory system for hotel bookings.

They  consortia members handle the public ledger. For frequent flyer miles, the airline issues frequent flyer miles by formula, double checked against their public manifest.  But, anyone can trade these discount coins.  

These apps drive the demand for intelligent cash cards as users are  wanting the same wallet for all currencies.