Unanswered: Key Expiration in Dbms_Obfuscation Toolkit
I'm using Oracle DBMS obfuscation Toolkit for encrypting card numbers in an application.
In this toolkit predefined functions - DES3 functions are defined etc. which use two types of keys for encryption:
1.) User supplied key
2.) key generated by DES3 function
In order to have secure user defined key, the user defined key needs to be changed periodically.
Is there any function or utility that can generate key which can be used to decrypt the encrypted data that was encrypted by old key?