SSO with external site using OpenSSL and/or xml encryption by RyanWH

We have a Drupal multisite setup, and need to implement a single sign on system with an external (non-PHP) site. Our tech partners at the external site suggested we use the following library: http://code.google.com/p/xmlseclibs/... (Budget: $25-$50 USD, Jobs: Drupal, PHP, XML)

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