This is a concept paper developed by the National Information Infrastructure Task Force, a working body of the President's National Security Telecommunications Advisory Committee. Its purpose is to stimulate discussion and elicit comments regarding a private sector entity intended to improve the common understanding of the nature and purpose of information systems security. The entity would promote information systems security principles and standards to improve the reliability and trustworthiness of information products and services. In its investigation, the NIITF has developed a proposed model to stimulate the development of a private-sector-based focal point to enhance the security component of the NII. This model is outlined in the paper.