Kerberos was conceived as a secure network authentication technology at Massachusetts Institute of Technology (MIT), where it continues to evolve. Using encryption as a seal, Kerberos credentials, or tickets, vouch for authenticated users. Because every node on the network exclusively trusts the Kerberos server, users' credentials are valid throughout the network. This way, they theoretically have to log in only once. In addition, Kerberos can provide support for real-time encryption of network communications. This is like keeping the doors in your city locked, but giving authorized citizens a key to every door. (Salowey)
In the Open Systems Interconnect (OSI) model, Kerberos sits above the Network and Transport layers (above TCP/IP), meaning that it's not as simple as adding a Kerberos module to your existing desktop operating system. Using Kerberos means replacing existing network applications with "Kerberized" applications that have been rewritten to take advantage of its services, such as automatic authentication and encrypted communications.
The question is, what is Kerberos and what can it do for my network? We implemented both Kerberos version 4 and beta releases of MIT's new version 5 at our Syracuse University lab to get a better feel for this technology and to determine whether the protocol truly can solve network security problems. Examples cited in this workshop are in Kerberos 4 format, which is the version in use on most networks.
Kerberos is an attractive technology, but it's not a network security solution. We were disappointed to learn that Kerberos wasn't going to solve our problems of networkwide user management. Kerberos doesn't replace even aged technology such as Sun Microsystems' Network Information Ser...
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...e with other realms throughout the Internet. Credential-forwarding will pass TGT to remote hosts when using a Kerberized network login instead of requiring the user to run kinit on the host.
Works Cited
Salowey, Joseph. Kerberos: A secure passport.
http://www.csee.wvu.edu/~cukic/Security/NotesKerberos.pdf#search='Salowey%2C%20Joseph.20%20Kerberos%3A%20A%20secure%20passport.'
Anthes, Gary. Kerberos code crack raises broader issues.
http://static.highbeam.com/c/computerworld/february261996/kerberoscodecrackraisesbroaderissues/
Stallings, William. Kerberos keeps the enterprise secure.
Rubin, Aviel. Kerberos Versus the Leighton-Micali Protocol.
http://www.ddj.com/documents/s=879/ddj0011a/0011a.htm
Chappell, David. Microsoft and the Kerberos Standard.
http://www.microsoft.com/technet/prodtechnol/windows2000serv/evaluate/featfunc/msjkerb.mspx
to beep twice when someone logged on from the Tymnet lines. The thing is, since
This question marks its way back to the time when people used to rely on the security of windows login credentials. The security no doubt prevented users from having access to one’s personal computer, but once a person had logged into the system, he/she would have the access to basically anything and everything that came their way.
Kerberos provides a secure authentication scheme. Authentication is needed to restrict the intruders and malicious users. The major security issues discussed are privacy of the data, integrity of data and authentication mechanism which is not there in Hadoop. Hadoop supports Kerberos for authentication and many security features can be configured with the Hadoop to restrict the accessibility of the data. The data can be associated with the user names or group names in which data can be accessed. Kerberos is a conventional authentication system, improved authentication systems can be used which are more secure and efficient than
The Secret Sharer: the essay. In the short story The Secret Sharer by Joseph Conrad, the narrator plays the captain of a merchant ship that is foreign to him. He was assigned to this foreign ship on a very short notice. He is expected to lead the crew to their destination, safely.
In view of emergence in cloud computing and cloud based identity management providers, the need for implementing SAML protocol is imperative. In addition, with the proliferation of SaaS (Software as a Service), and other web based applications, identity management has become challenging for various enterprises. Handling so many usernames and passwords for your intranet, cloud, webmail, HR system, and other resources is nothing but bothersome especially when your workforce is huge. This is where SAML is desperately needed. Many hosted services providers support SAML for authentication including Google Apps, Salesforce.com, Zendesk and Zoho. Thousands of large enterprises have adopted it as their standard protocol for their communicating identities across their network environments.
What concerns the government of the United States most is the security of the critical infrastructure from the cyber threats. The nation is depending heavily on the technology in most of its critical sectors to keep it up and running. Thus, this makes its more vulnerable to cyber-attacks from outsiders and insiders. Therefore, its protection must be a priority.
ABSTRACT : This paper describes the basic threats to the network security and the basic issues of interest in designing a secure network. it describes the important aspects of network security. A secure network is one which is free of unauthorized entries and hackers. INTRODUCTION
As the internet is becoming faster and faster, an operating system (OS) is needed to manage the data in computers. An Operating system can be considered to be a set of programed codes that are created to control hardware such as computers. In 1985 Windows was established as an operating system and a year earlier Mac OS was established, and they have dominated the market of the computer programs since that time. Although, many companies have provided other operating systems, most users still prefer Mac as the most secured system and windows as it provides more multiple functions. This essay will demonstrate the differences between windows
...ks) each user connects to another user, only using a server to find other users.
Due to their complexity and importance to information security, two security systems, Network Intrusion Detection/Prevention Systems (NIDPS) and Security Information and Event Management systems (SIEM), will be explored in this paper. Both have multiple functionalities, including threat-detecting capabilities, and are widely considered essential tools for adequate network defense, particularly in the goal of fortifying valuable assets in the face of an advanced threat. Understanding these systems is vital for any security operation tasked with defending significant networks.
A network can be based on either a peer-to-peer level or server-based, also referred to as domain-based. To distinguish the difference, a peer-to-peer network, also known as a workgroup, is a network in which a group of computers are connected together to share resources, such as files, applications, or peripherals. The computers in a peer-to-peer network are peers to one another, meaning no single computer has control over one another. There is also no central location for users to access resources, which means that each individual computer must share their files in order for other computers to have access (Muller, 2003, p.411). “In a peer-to-peer environment, access rights are governed by setting sharing permissions on individual machines.” (Cope, 2002) On the other hand, in a domain-based network, the computers connected together are either servers or clients. All of the other computers connected to the network are called client computers. The server is a dedicated machine that acts as a central location for users to share and access resources. The server controls the level of authority each user has to the shared resources. When logging on to the network, users on client machines are authenticated by the server, based on a user name and password (Lowe, 2004, p.13).
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Description – This article consists of information about the SIP protocol used in VoIP. It also provides the information about SIP architecture, SIP components, SIP applications and the difference between SIP and H.323 protocol.
Rayne, PB, Kulkarni, P, Patil, S & Meshram, BB 2012, ‘Authentication and Authorization:Tool for Ecommerce Security’, Engineering Science and Technology: An International Journal, vol. 2, no. 1, pp. 150-157.