The key component of TravelChain is the **Traveler Passport, a model of distributed trust that allows you to form an image of another person without being acquainted personally**. When dealing with unknown people it is difficult to predict their actions. However, this is critical when it comes to money, private property, and health.
#### Key features of Traveler Passport:
· Sociability
· Responsibility
· Benevolence
· Intelligence
Applications within the TravelChain ecosystem provide users and members of the business community with an opportunity to rank one another according to various key parameters, and to submit reviews. A rating is created for that context and stored in TravelChain. This, along with a traveler’s travel history, constitutes a Traveler Passport.
#### API
API commands (Application Programming Interface) enable the developers to design their TravelChain-based applications and web-services. API also enables getting access to the whole set of operations in a blockchain using limited and predefined set of commands.
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