Calypso Specification

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    Calypso Networks Association
    
    
  

  
Open standard for contactless transit ticketing using ISO 14443-B, widely deployed in European public transport systems.

  
  
Calypso is an open contactless ticketing standard built on ISO/IEC 14443 Type B, created by a consortium of European transit authorities to avoid proprietary lock-in. It underpins fare systems including Paris's Navigo, Brussels, and Lisbon, and specifies a secure session protocol that completes a validation in roughly 100 milliseconds even when the card is briefly presented.

  
  

    
    Calypso
    
    
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    Published 1996
    
    
  






  
  

    
    




    
    

    
    

    
    

      
Standard Details

      

        

          
            
            
            
CategoryCalypso Networks Association

            
            
            
Year Published1996

            
            
            
            
StatusActive

          
        

      

    


    
    

    
    

    
    
    
    

      
Compliant Card Types

      

        
        
          

            
Calypso Card

            Contactless
          

          
Open-standard contactless card for European transit systems, using ISO 14443-B for interoperable fare collection.