Internet Security

The Internet is global in scope, but this global internetwork is an open insecure medium. The Internet has revolutionised the computing and communications world for the purpose of development and support of client and server services. The availability of the Internet, along with powerful affordable computing and communications, has made possible a new paradigm of commercial world. This has been tremendously accelerated by the adoption of browsers and World Wide Web technology, allowing users easy access to information linked throughout the globe. The Internet has truly proven to be an essential vehicle of information trade today.

The Internet is today a widespread information infrastructure, a mechanism for information dissemination, and a medium for collaboration and interaction between individuals, government agencies, financial institutions, academic circles and businesses of all sizes, without regard for geographic location. People have become increasingly dependent on the Internet for personal and professional use regardless of whether it is for e-mail, file transfer, remote login, Web page access or commercial transactions. With the increased awareness and popularity of the Internet, Internet security problems have been brought to the fore. Internet security is not only extremely important, but more technically complex than in the past. The mere fact that business is being performed online over an insecure medium is enough to entice criminal activity to the Internet.

The Internet access often creates a threat as a security flaw. To protect users from Internetbased attacks and to provide adequate solutions when security is imposed, cryptographic techniques must be employed to solve these problems. This book is designed to reflect the central role of cryptographic operations, principles, algorithms and protocols in Internet security. The remedy for all kinds of threats created by criminal activities should rely on cryptographic resolution. Authentication, message integrity and encryption are very important in cultivating, improving, and promoting Internet security.Without such authentication procedures, an attacker could impersonate anyone and then gain access to the network. Message integrity is required because data may be altered as it travels through the Internet. Without confidentiality by encryption, information may become truly public.

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Author: John Wiley & Sons Ltd
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