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CNA published the White Paper Account Based Ticketing : The evolution of ticketing with Calypso.

Account Based Ticketing is already considered as the next major evolution in Ticketing Systems, while Calypso - a card centric model deployed in 125 cities around the world since 20 years, has been adopted in many contactless ticketing schemes in the world. The question for CNA is to see what part Calypso could and should play in account-based ticketing and what evolutions are required.

By combining those two models, CNA truly believes that each network could take advantage of both worlds, and fine-tune a solution depending on its own requirements and specificities. That’s why CNA has launched a working group in June 2017 in order to define a set of guidelines of specifications for an ABT – Calypso system. We also invite you to discover our white paper "Calypso and Account-based Ticketing" written in coordination with BMC & Ixxi, providing a relevant analysis of ABT with first tracks for Calypso in the ABT ecosystem.

Calypso and Account-based Ticketing White Paper is available here