I have experience of working with WorldPay's "Select Junior" account. That works well, and can be set up to be acceptable secure something like this: configure the WP account to invoke a callback CGI script on your own server on completion, and configure a password for it to supply; when invoked, check that a) you were invoked via https; b) the password has been supplied correctly; then c) look up the order reference supplied, d) check that the currency and amount tally with what you expected, and e) that the transaction was successful.

I recently started looking at the PayPal offerings, and it looks as if the mechanisms they provide are similar enough to offer the same degree of security for a similar amount of development effort.

I also looked at another option, the "Protx Form kit". Unfortunately I wasn't able to see a way to use this securely, and when I spoke to their developers they agreed with my analysis of the vulnerabilities, but did not offer any hope that they might be fixed. (The company also offers a "Server kit", but it's Windows only so I didn't evaluate it.)

Hugo

In reply to Re: OT: Third Party Credit Card Processors by hv
in thread OT: Third Party Credit Card Processors by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.