Revoke privileges from user 'informix'

Hello there, I have a system and it allows the support personnel to log in and fix the probs on my server. The support personnel use the login of 'informix' to fix the problems. In such cases I do not want these support personnel to have a look at my data. Effectively I want to revoke/restrict the Select, Update, Insert or Delete privilege on the user 'informix'. I can use triggers to restrict the Update, Insert or Delete privilege. But there is no trigger on Select. Is there any easier way to implement this. Thanks, Dilip Kikla Infodata Ltd. Sharjah U.A.E. E-mail : infodsh@emirates.net.ae Tel : +971 6 599848 Fax : +971 6 592618