Network Security

SECURITY to prevent unauthorized interceptors from accessing data

NETWORK any set of interlinking components resembling a net

Need for Network Security

Theft and misuse of confidential business information…  Malicious attacks from Internet- borne viruses… Illegal Data Modification

To prevent..,

Who is vulnerable….?Financial institutions and banksInternet service providersGovernment and defense agenciesContractors to various government agenciesMultinational corporationsANYONE ON THE NETWORK

Means of Protection

Firewalls Strong passwords Suitable Antivirus

software etc..,

Of them , one of the essential aspect for secure data transfer

is “cryptography”

Principles of CryptographyEncryption transforms a message that it becomes unintelligible to any one who does not have the key.

Decryption transforms a message into original message to any one who have the key.

cipher The transformation represented by an encryption function and its corresponding decryption function is called a cipher.

Types of ciphers

Symmetric Key Ciphers

Public Key Ciphers

Symmetric Key Ciphers

Public Key Ciphers

ADVANTAGES

Protects against internal and external network attacks

Ensures privacy of all communications, at any place at any time.

Makes you more reliable.

Controls access to information by accurately identifying users and their systems.

 ie.., the  network  security  will  be  able  to function as an immune system.  

ATTACK AND BUILD ITSELF TO FIGHT AGAINST TOUGHER ENEMIES