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This document presents the security mechanisms implemented in Hoplink that allow it to be used by several partners.
It also describes how these mechanisms can be implemented to counter the risks associated with key sharing between different operators.
In addition, it specifies the functional and security features related to the implementation of Hoplink in a mobile NFC environment.
Hoplink is a Calypso application compliant with the Calypso Prime Revision 3 specification, designed to meet the needs of interoperability between different transport networks.
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