vb.net qr code Security in a SIP Network in Software

Drawing ANSI/AIM Code 39 in Software Security in a SIP Network

Security in a SIP Network
Recognize Code 39 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Paint Code-39 In None
Using Barcode creator for Software Control to generate, create Code 3/9 image in Software applications.
This example shows how the realm is identified within a security context in a SIP INVITE:
Decoding Code39 In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Encode USS Code 39 In C#
Using Barcode generator for .NET Control to generate, create ANSI/AIM Code 39 image in .NET applications.
INVITE sip:travis.russell@tekelec.com SIP/2.0 AUTHORIZATION: Digest realm="tekelec.com"
Create ANSI/AIM Code 39 In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create Code39 image in ASP.NET applications.
Encoding Code 3 Of 9 In Visual Studio .NET
Using Barcode drawer for .NET Control to generate, create Code 39 Extended image in VS .NET applications.
When a subscriber is in their home network, and are establishing sessions within their home domain, they are still authenticated by their home network. However, the home network has all of the subscriber s credentials and can easily authenticate the subscriber without issue. When the same subscriber is roaming in another network, the visited network does not have the credentials to authenticate the subscriber. Therefore, an agreement must be established between the home network and the visited network. This agreement allows for both network operators to exchange subscriber details necessary to authorize services, and to bill one another for services rendered when each operator s subscribers are roaming in the other operator s network. The reason many phones do not work in other networks when you are roaming is quite simple. The operators do not have an agreement between themselves, and therefore your device is not granted authorization to access any services. This situation is getting a little better as operators partner with more and more networks, allowing their subscribers to roam in many different countries, but there is still a long way to go. Take the cable industry, for example. The cable industry has established a federation among all of the cable operators. All members of the federation are considered as trusted domains and can exchange subscriber and billing information with one another. This means that the cable operators have effectively created a massive network of networks where their subscribers can get services as if they were in their home network without restriction. Of course, cable operators have not gone wireless yet. Many have offered wireless services through established wireless carriers but have not launched their own networks. This is all rapidly changing as the cable industry quietly adds more and more services to its portfolio. When cable companies do build out their own wireless networks, they will be part of a huge network composed of many different trusted domains. There are basically six aspects to securing a SIP network:
Drawing Code 3 Of 9 In Visual Basic .NET
Using Barcode drawer for .NET framework Control to generate, create Code 39 Full ASCII image in .NET applications.
Data Matrix 2d Barcode Creator In None
Using Barcode generator for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
Authentication Authorization Confidentiality Integrity Privacy Non-repudiation
Barcode Encoder In None
Using Barcode maker for Software Control to generate, create barcode image in Software applications.
Making GTIN - 128 In None
Using Barcode printer for Software Control to generate, create EAN / UCC - 13 image in Software applications.
7
ANSI/AIM Code 39 Creation In None
Using Barcode encoder for Software Control to generate, create Code 39 image in Software applications.
Code 128 Code Set B Creation In None
Using Barcode creation for Software Control to generate, create Code128 image in Software applications.
Authentication requires the use of passwords and the exchange of credentials. We talked a little about this already. Whenever a subscriber registers his or her location with the network, the registrar should always challenge the initial registration. This challenge is explained in more detail in the course of this chapter. It is unfortunate that many networks simply do not challenge registrations. Instead they verify the user identity and trust that the identity is true. This is one of the reasons there are so many attacks on SIP networks today. Simply challenging the registrations could eliminate many security breaches. Authorization requires querying a database containing the basic account information for a subscriber. This account information provides the public as well as private identities for the subscription, and all the services the subscriber is authorized to access. This can be part of the authentication process to be most effective. Confidentiality protects the subscriber and the subscriber s identity. It ensures that conversations cannot be snooped on, and that the subscriber can exchange information freely without the information being captured by someone else. This remains one of the big challenges for network operators, especially given the many tactics being used today to capture sensitive data from subscribers. At the same time, it is equally important that the integrity of any data sent by a subscriber be sent intact without alteration. This includes any Web sites that may have been accessed as well. It is far too easy for hackers to access SIP messages and change the contents in an effort to change the service and where it is being delivered. It is also very easy to capture a SIP message containing text and alter the text message before it is delivered to its final destination. Privacy can sometimes be an issue when it is openly provided to anyone. Today on the Internet there are anonymous services where e-mails and other messages can be directed in an effort to hide the address of the originator, and make it appear that the message came from someplace else. At the same time, privacy can also be offered as a feature to some clients who have a need for such a feature. One example of this is law enforcement agents. Today when they make a call, the call does not give away their identity or the number they are calling from. This is an important service to law enforcement agencies and government alike, and it should be maintained even in the SIP domain. Finally, non-repudiation prevents subscribers from accessing services and later denying they used those services. If the operator implements the right tools and audit systems, you should have total visibility to every network transaction that takes place. This includes any downloads that the subscriber may have made. Today this is not the case, and the reason many operators are losing money on music and ringtone downloads. While it is true they are making money on these services, it is also a documented fact that they are losing even more money. One industry analyst firm reports error rates in the reporting of downloads to be as high as 80 percent. The reason for this is simple: no monitoring systems are capable of supporting all of the protocols used within a SIP network. We have listed the various aspects of a security deployment. Now let s talk about the specifics behind security implementations in a SIP network. These are simple
ITF14 Maker In None
Using Barcode generator for Software Control to generate, create UPC Shipping Container Symbol ITF-14 image in Software applications.
EAN / UCC - 13 Generator In Visual C#.NET
Using Barcode drawer for .NET Control to generate, create EAN 13 image in .NET framework applications.
Barcode Generation In Objective-C
Using Barcode drawer for iPhone Control to generate, create bar code image in iPhone applications.
GTIN - 12 Drawer In None
Using Barcode printer for Font Control to generate, create UCC - 12 image in Font applications.
Code 128A Creator In Java
Using Barcode creation for Java Control to generate, create USS Code 128 image in Java applications.
Bar Code Generation In Java
Using Barcode creation for Eclipse BIRT Control to generate, create barcode image in Eclipse BIRT applications.
Barcode Encoder In Objective-C
Using Barcode printer for iPhone Control to generate, create barcode image in iPhone applications.
Bar Code Scanner In Java
Using Barcode Control SDK for BIRT Control to generate, create, read, scan barcode image in BIRT applications.
Copyright © OnBarcode.com . All rights reserved.