Securing stored procedures and triggers

We are currently migrating from Sybase's ASA 9/10 to PostGres 8.2.4.  One of the features that is really nice in ASA is the ability to add the attribute hidden to a Create procedure, Create function and Create trigger.  Essentially what this does is encrypt the code so that if anyone or any utility gets into the database they cannot see any of the actual code.  This is a great feature for protecting intellectual processing techniques.  I don't know if there is anyway to do this in PostGres.  Before the hidden feature was added, we had a competitor  steal some of our stored procedure processing code.  Is there anyway to protect this from happening in PostGres?