Penetration Testing: Payment Processing

["Beauregard, Claude Q" <CQBeauregard () aaamichigan com>]

I was wondering if anyone has had first hand experience with payment gateway
providers. I am particularly interested with the security surrounding the
Web interface used by these payment gateways. If you have any useful
information including access to white papers on the subject I would
appreciate it.

I'm familiar with Verisign's Pay Flo Pro but the following I have never
worked with:

www.surepay.com - SurePay
www.cybersource.com - CyberSource
www.pccharge.com - RiTA Server, PC Charge

Thanks

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