Single sign-on. Single sign-on (SSO) is a property of access control of multiple related, but independent software systems. With this property a user logs in once and gains access to all systems without being prompted to log in again at each of them. Conversely, single sign-off is the property whereby a single action of signing out terminates access to multiple software systems.
As different applications and resources support different authentication mechanisms, single sign-on must internally translate and store credentials for the different mechanisms, from the credential used for initial authentication. Benefits[edit] Benefits of using single sign-on include: Reducing password fatigue from different user name and password combinationsReducing time spent re-entering passwords for the same identityReducing IT costs due to lower number of IT help desk calls about passwordsIncreases security of third party accounts because long and complicated passwords can be set without needing to remember them. Federated identity. A federated identity in information technology is the means of linking a person's electronic identity and attributes, stored across multiple distinct identity management systems.[1] Related to federated identity is single sign-on (SSO), in which a user's single authentication ticket, or token, is trusted across multiple IT systems or even organizations.
SSO is a subset of federated identity management, as it relates only to authentication and is understood on the level of technical interoperability. Federated identity management[edit] In information technology (IT), federated identity management (FIdM) amounts to having a common set of policies, practices and protocols in place to manage the identity and trust into IT users and devices across organizations.[2] Single sign-on (SSO) systems allow a single user authentication process across multiple IT systems or even organizations.
The notion of identity federation is extremely broad, and also evolving. Technologies[edit] Examples[edit] Software as a service. According to a Gartner Group estimate, SaaS sales in 2010 reached $10 billion, and were projected to increase to $12.1bn in 2011, up 20.7% from 2010.[6] Gartner Group estimates that SaaS revenue will be more than double its 2010 numbers by 2015 and reach a projected $21.3bn. Customer relationship management (CRM) continues to be the largest market for SaaS. SaaS revenue within the CRM market was forecast to reach $3.8bn in 2011, up from $3.2bn in 2010.[7] The term "software as a service" (SaaS) is considered to be part of the nomenclature of cloud computing, along with infrastructure as a service (IaaS), platform as a service (PaaS), desktop as a service (DaaS), backend as a service (BaaS), and information technology management as a service (ITMaaS).
History[edit] Centralized hosting of business applications dates back to the 1960s. Starting in that decade, IBM and other mainframe providers conducted a service bureau business, often referred to as time-sharing or utility computing. Internet hosting service. An Internet hosting service is a service that runs Internet servers, allowing organizations and individuals to serve content to the Internet. There are various levels of service and various kinds of services offered. A common kind of hosting is web hosting. Most hosting providers offer a combination of services; e-mail hosting, for example. DNS hosting service is usually bundled with domain name registration. Types[edit] Full-featured hosting[edit] Full-featured hosting services include: Complex Managed Hosting, applies to both physical dedicated servers and virtual servers, with many companies choosing a hybrid (combination of physical and virtual) hosting solution.
Other[edit] Limited or application-specific hosting services include: Bandwidth cost[edit] Patent dispute[edit] References[edit] See also[edit] On-premises software. On-premises software (sometimes abbreviated as "on-prem" software) is installed and run on computers on the premises (in the building) of the person or organisation using the software, rather than at a remote facility, such as at a server farm or cloud somewhere on the Internet.
On-premises software is sometimes referred to as “shrinkwrap” software, and off-premises software is commonly called “software as a service” or “computing in the cloud”. The on-premises approach to deploying and using business software was the most common until around 2005, when software running at a remote location became widely available and adopted. [citation needed] The new, alternative deployment and use model typically uses the Internet to remove the need for the user to install any software on premises and had other accompanying benefits: running software remotely can result in considerable cost savings because of reduced staffing, maintenance, power consumption, and other factors. Software as a service.