DatabaseJournal Article on DBMS_OBFUSCATION_TOOLKIT
"To secure sensitive data, Oracle provides developers with the DBMS_OBFUSCATION_TOOLKIT, an industrial strength version of the DBMS_RANDOM package. You may feel the need of a decoder just to keep track of all the acronyms and to decrypt the errors in Oracle's sample code, but once you see how easy it is to use, you'll be able to take Oracle's code example and modify it for your own use." writes Steve Callan in an article for DatabaseJournal.com.