Security question: Can you decompile a PL/SQL compiled procedure?

I am wondering if anyone would be able to tell me if it is possible to decompile a compiled oracle PL/SQL procedure.
Scenario:
I create some data encryption code in PL/SQL that contains an encryption key string. I compile the PL/SQL as a stored procedure and store that binary object as a BLOB in the database. If a hacker can snag a whole database that would include this BLOB and he figures out that the BLOB might contain the key, can he get access to the key by decompiling somehow the BLOB back into PL/SQL statements?
Thanks in advance!!
Gary Glover, CISSP
[email protected]

Gary, when a hacker gets into your database (with sysdba rights), your are pretty much screwed - even with encrypted code and data.
To obtain that level of access, the hacker must be good. And persistant. Thus you can expect that he will compromise the rest of the stuff inside the database.
Alternatively, your database security was shoddy - trying to patch security via encrypting code in the database is a poor second.
It is also a question of time and effort vs. benefits. Spend 80% attempting to secure the code in the database, and 20% securing the database? Or 90% securing the database and 10% securing the code and data in the database?

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