Abstract

Identity and access management is an advanced field which offers a number of solutions to store identities and\nprovide access to information and communication technology resources. Currently, organizations leverage a variety of makeas-\nyou-go solutions to manage their entire Identity Management infrastructure. Since directory services are at the center of\nthe information and communication technology market, it needs immediate attention from the research community. This\npaper focusses on the importance and good understanding of directory services, which form the basic building block of an\nefficient identity and access management. It also examines different types of traditional on-premise directory services\nsolution to identity and access management. Furthermore, this paper discusses a new wave of cloud-based directory services\nsolution commonly known as Directory-as-a-Service (DaaS). DaaS solutions are cloud-based directories which are delivered\non a Software-as-a-Service (SaaS) business model and have an inherent advantage of least maintenance of directory due to its\nservice oriented nature.