Privacy is major concern for both web users and e-businesses. Research and implementation have begun in the areas of privacy enforcement architecture like the Architecture for Privacy Enforcement using XML (APEX) and the complimentary mechanisms of APEX. This thesis provides the design of the Enhanced Architecture for Privacy Enforcement using XML (EAPEX)which takes into consideration user privacy preferences to enforce the negotiated privacy practices pertaining to web users’ private data and to address web users’ privacy concerns in an e-business environment. This thesis research also develops the design of new system architecture,called the Architecture for Privacy Enforcement using Policy Based Encryption (APEP), for negotiated privacy practices enforcement in the e-commerce environment using on a promising Policy Based Encryption (PBE) system. A major benefit of this architecture design is that it seems to have less system complexity because privacy control is automatically achieved by using the PBE.