Issue
If you are using LiveCycle RightsManagement ES2 SP2 (9.0.0.2) to apply policies to documents, and you have selected the option “Encrypt all document contents except metadata” in the policy, you will notice that the metadata is encrypted by mistake.
The option to omit the metadata from encryption can be configured when creating the policy as described below (Unchangeable Advanced Settings > Document Restrictions):
http://help.adobe.com/en_US/livecycle/9.0/rightsMgmtHelp/help.htm?content=000273.html#1604485
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Read the complete post at David's blog.