4 min read
Martin Rupp (guest): 10. February 2023
The “Four Corners” model, also called the “Four Party Scheme”, is utilized in almost all standard card payment systems across the globe. Here, we...
3 min read
Martin Rupp (guest): 05. November 2022
This article proposes a few answers to a series of frequently asked questions (FAQs) about key blocks and their use with PCI.
4 min read
Martin Rupp (guest): 19. October 2022
In the “four corner model”, acquirers are apparently the less active party as their role seems ‘only’ to forward the transaction flow originating...
3 min read
Martin Rupp (guest): 22. September 2022
An issuer is one of the corners in the ‘four corner’ model. An issuer is a financial organization (e.g. a bank) that produces payment cards and...
4 min read
Martin Rupp (guest): 16. June 2022
Cardholders (or consumers) are one of the corners of the ‘four corner’ model in the payment card world. Here we take a brief look at the payment...
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