Public documents  means there is no constraint on the document diffusion. Reproduction is authorized and diffusion by e-mail is possible. It is not necessary to login to download public documentation.

Two Calypso documents are public :

• Functional Card Application v 1.3 (268 KB)  (dated 25/10/2005)
  This document contains a functional description of the Calypso ticketing card application.
  Calypso contactless cards are contactless smartcards for payment of public transport compatible with the Calypso specification. They are used as part of a secure contactless system including a central system, reloading equipment, validators, and possible other equipments.
  All parts of the system must be designed with some of the major goals of a secure contactless system in mind, particularly the speed and security of transactions. The present manual therefore contains some guidelines on the card uses, some typical transactions descriptions and guidelines on the overall system design.
  
  
• SAM and Key Management Functional Presentation (78 KB) (dated 15/01/2003)
  This document contains an introduction to the Calypso SAM functionalities and to the recommended management of the ticketing secret keys.