E-Commerce Designer Questions

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Hello,

I took the e-commerce designer test this morning and faired pretty poorly, much to my surprise. Can anyone provide any good links to me regarding the topics of mid-level/high-level storefronts? There were several questions about this topic and I really don't know much about it, anyone have good links for this?

In addition, does anyone have a good page that summarizes security and authentication (like encryption types, SSL, SET, digital certificates, etc)? I thought I knew a reasonable amount about this area but missed several questions here too and would like a good resource for more information, if anyone has one).

Thanks for any help you can provide!