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GOOD MORNING TO ONE AND ALL

GOOD MORNING TO ONE AND ALL. OUR TEAM. VENKATESH THARUN SADIK FROM AVANTHI ENGG. COLLEGE. OUR TOPIC. NETWORK-SECURITY CRYPTOGRAPHY. NETWORK-SECURITY. INTRODUCTION FOR SECURITY WHAT IS MEANT BY NETWORK-SECURITY ? NEED FOR THE SECURITY ?. NEED FOR SECURITY.

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GOOD MORNING TO ONE AND ALL

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  1. GOOD MORNING TO ONE AND ALL

  2. OUR TEAM VENKATESH THARUN SADIK FROM AVANTHI ENGG. COLLEGE

  3. OUR TOPIC NETWORK-SECURITY CRYPTOGRAPHY

  4. NETWORK-SECURITY • INTRODUCTION FOR SECURITY • WHAT IS MEANT BY NETWORK-SECURITY ? • NEED FOR THE SECURITY ?

  5. NEED FOR SECURITY • Protect valuable or sensitive organizational information while making it readily available. • System administrators need to understand the various aspects of security to develop measures and policies to protect assets and limit their vulnerabilities.

  6. TRAFFIC REGULATIONS TYPES OF DEFINITIONS : • ROUTER TRAFFIC REGULATION • FIREWALL TRAFFIC REGULATION • HOST TRAFFIC REGULATION

  7. FIREWALLS INTRODUCTION : • Firewalls make it possible to filter incoming and outgoing traffic that flows through your system. • The rules of a firewall can inspect one or more characteristics of the packets, including but not limited to the protocol type, the source or destination host address, and the source or destination port. • Firewalls can greatly enhance the security of a host or a network.

  8. Diagrammatic representation of a Firewall GLOBAL INTERNET FIREWALL I N S I D EOUTSIDE

  9. USES OF FIREWALLS • To protect and insulate the applications and services of your internal network from unwanted traffic coming in from the public Internet. • To limit or disable access from hosts of the internal network to services of the public Internet. • To support network address translation (NAT), which allows your internal network to use private IP addresses and share a single connection to the public Internet

  10. DIFFERENT TYPES OF THREATS TO NETWORK • E-MAIL BOMBS • MACRO’S • VIRUSES • SPAM

  11. CRYPTOGRAPHY • What is cryptography? • SERVICES • Decryption is the reverse of encryption, and Hash functions-it involves the use of zero keys. • Secret key functions-it involves the use of one key. • Public key functions-it involves the use of two keys.

  12. TYPES OF CRYPTOGRAPHIC FUNCTIONS • Decryption is the reverse of encryption, and Hash functions-it involves the use of zero keys. • Secret key functions-it involves the use of one key. • Public key functions-it involves the use of two keys.

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