In today's digital era, internet and cloud computing, usability and security are most extremely important. Swift interaction on
the internet is, however, often compromised by the need of frequently entering usernames and passwords. To prevent users from having
to authenticate frequently, services can be provided with Single Sign-On. There are several SSO protocols available, all of which have
different properties. This paper provides a comparison of these protocols based on their suitability and security. The comparison should
help to decide and build SSO protocol. Information about several SSO protocols are gathered. The protocols are compared based on their
properties and functionality namely OpenID Connect, SAML and LDAP. This paper focuses on performing a security analysis on these
protocols and recommends a better protocol for implementing a single sign-on service. It turned out that SAML is used most often.
Protocol called SAML is a commonly used protocol with security vulnerability in the implementation. But OpenID Connect is the fastest
growing protocol. The LDAP protocol was built for server SSO in a local network and not for web applications and also LDAP is the
least famous protocol. Both LDAP and SAML are becoming out dated, whereas OpenID Connect is new, web oriented and used by
many leading companies such as Google, Yahoo and Facebook. OpenID Connect offers authentication and authorization. It uses modern
standards and has a growing community. Because of this OpenID Connect is the best protocol to build SSO.
Published In:IJCSN Journal Volume 8, Issue 2
Date of Publication : April 2019
Pages : 138-143
Tables : 01
R. Rackymuthu :
B.Sc., M.Sc pursuing M.Phil
in Department of Computer Science,
Government Arts College, Coimbatore-641 018.
Qualification) Assistant Professor,
Department of Computer Science,
Government Arts College (Autonomous),
Coimbatore - 641 018.
OIDC, SAML, LDAP, SSO, XML
OpenID Connect is the newest protocol (2014), and LDAP
is the oldest (1993). Because LDAP was released when the
internet was still in its infancy, its focus is not on web
applications but on communication between servers of an
enterprise. SAML and OpenID Connect both offer
authentication and authorization, and both focus on the
web. This means that they use protocols and notations in
their communications that are supported by the web, that
they are light weight and that they also support SSO on
multiple domains. SAML protocol have major
implementation problem named XML Wrapping Attack.
That is a chance for the intruders to alter the messages. So
OIDC is a best choice for this problem.
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