Technical framework

 CALYPSO focuses on the ticketing transaction between the card and the terminal. This transaction is organised as illustrated below:

 

 
Layer
International Standard
Calypso Status
7
Security Management and Architecture   Calypso Security Architecture
6
Terminal Applicative Software   Calypso API
5
Data Model   Calypso Data Model
4
Card and SAM Security Mechanisms   Calypso card application
3
Card Data structure CEN EN 1545  
2
Card OS and Files structure & Commands ISO 7816-4  
1
Contact and Contactless Communication Interface ISO 7816 1-3
ISO 14443 A/B 1-4
 
       

 

The development of the Calypso ticketing application is based on the international standards (when they exist):

 

Calypso allows for the development of a ticketing application between a card and a terminal by supplying a time proven solution for all layers 1 to 7. Therefore, it complements the existing standards to create a secure ticketing transaction between a card and a terminal