Outlook Security

["Thiago Lima lst" <thiagolima () webforce com br>]

        I'm searching for tools to enhance outlook (local pst) security. 
        
        - I'd like to encrypt some folders in the pst ( not all folders )
        - And if it is possible I'd like to hide some folders. And show then
only if a password or key is entered. 

        I'm googling for it and can't find anything that looks like this.
Does any one know any tool like this?

Thanks a lot,
Thiago lima.