Cryptography and Network Security Seminar

[born_for seminars]

Abstract
Cryptography is science of writing secret code of using mathematics to encrypt and decrypt data. Cryptography enables to store sensitive information or transmit it across insecure networks (like the Internet) so that it cannot read by anyone except the intended recipient.
Cryptography is a complicated subject, historically only tackled by well-trained and experienced experts. However, as more and more people become ``wired'', an increasing number of people need to understand the basics of security in a networked world, explaining the concepts needed to read through the hype in the marketplace and understand risks and how to deal with them. We go on to consider risk management, network threats, firewalls, and more special-purpose secure networking devices.
The networks are both public and private, that are used every day to conduct transactions and communications among businesses, government agencies and individuals. The networks are comprised of ‘nodes’, which are ‘client’ terminals, and one or more ‘servers’ and ‘host’ computers. They are linked by communication systems, some of which might be private, such as within a company and others which might be open to public access. The obvious example of a network system that is open to public access is the Internet, but many private networks also utilize publicly-accessible communications. Today, most companies' host computers can be accessed by their employees whether in their offices over a private communications network, or from their homes or hotel rooms while on the road through normal telephone lines.
What is a Network? : A ‘network' has been defined as ‘any set of interlinking lines resembling a net, a network of roads an interconnected system, a network of alliances.’ A computer network is simply a system of interconnected computers. How they're connected is irrelevant, there are a number of ways to do this.
What is Cryptography? : Cryptography is the study of mathematical techniques related to aspects of information security such as confidentiality, data integrity, entity authentication, and data origin authentication. Cryptography is not the only means of providing information security, but rather one set of techniques. One essential aspect for secure communications is that of cryptography, Network security Measures Company to protects computer systems, and it’s prime concern for every company that uses computers. Compromised network security means a hacker or competitor may gain access to critical or sensitive data, possibly resulting in data loss, or even complete destruction of the system. Appropriate network security is achieved when a user has to go through several layers of security before being able to access the desired network. ‘The more layers the system has, the more secure it is’. The systems administrator is often in charge of network security since he has administrator privileges on the system. A systems administrator will also build a secure firewall for the network, which may include an encryption layer and sentinel. Software’s that automatically repels an unauthorized programmers from gaining access, The administrator may also place restrictions on employees’ computers to prevent them from accessing websites that may have malicious coding or malware that will install itself on a user’s computer. U.S. companies spend millions of dollars each year in network security measures. Firewalls with no single point of access, sharp system administrators, frequent security updates, and early installation of anti-adware will all help keep a network safe.Network security involves all activities that organizations, enterprises, and institutions undertake to protect the value and ongoing usability of assets and the integrity and continuity of operations. An effective network security strategy requires identifying threats and then choosing the most effective set of tools to combat them.