sharing PIN try counter -CVM retry counter- EMV GP contactless payment card
970175Oct 23 2012 — edited Nov 12 2012I am trying to find out information regarding Pin try counter (referred to as the CVM retry counter in the the Global Platform 2.1.1 specs). We require a multi application card - one Mchip application and one proprietary application - The GP spec states that the PIN is shared accross applications (global PIN) however I am trying to find out the status of PIN try counter -can it be shared accross applications or is this not feasible? Also same question regarding the application transaction counter (ATC).
GP spec is not clear on this - but it seems that counter sharing is not a requirement. Even if not a requirement, is it possible? Thanks
GP spec states:
The CVM state may be used by an Application to assist in managing PIN related functions. The non-atomic states
of the CVM may be seen within a Card Session. The CVM state, the Retry Limit, and the Retry Counter are
closely related. All CVM state transitions are immediately visible to the Application that caused the transition as
well as to any Applications that may be selected on other logical channels.