EMV transaction flow - The following is the high level overall emv transaction flow diagram without
elaborating each of the steps.
An EMV transaction has the following steps:
- Application selection;
- Read Application Data
- Off-line Data Authentication
- Processing Restrictions
- Cardholder Verification
- Terminal Risk Management
- Terminal Action Analysis
- Go On-Line (Card)?
- On-Line Processing
- Script Processing
A detailed flow chart describing processes in an EMV transaction flow from application selection through to completion script processing.
- Single application card:
- no choice
- no choice
- terminal capabilities
- scheme/brand rules
- cardholder choice
- Application priorities can reflect cardholder marketing proposition
EMV Terminal Selection. Select EMV terminals with the right capabilities and approvals to meet your customers needs. EMV is an option-based specification.
Examples of changes to EMV terminal selection will include different key lengths and different cryptographic algorithms in the future.
It can be expected that there will eventually be more frequent terminal application and EMV configuration updates or, at a minimum, the need to load new keys to the EMV terminals.
- Which applications do you have?
- I have M/chip EMV and Health
- I only know M/chip therefore I select M/chip
Offline Data Authentication
- Each bank cannot establish relationship with every other one.
- Third party agent vouches for the trustworthiness of individuals:
- Associate public key - issuer
- Third party agent = Certification authority (Payment Scheme)