Explain in detail about a model for network security

Cryptography And Network Security slides

1. Model for Network Security

Trusted third party
(e.g., arbiter, distributer
of secret information)

Sender Recipient

Security-related Security-related
transformation transformation

Secret Secret
information information

2. Model for Network Security

> using this model requires us to:

1 design a suitable algorithm for the security
transformation

2, generate the secret information (keys) used
by the algorithm

3 develop methods to distribute and share the
secret information

4 Specity/a protocol Enabling the) principals to
üserthetransiormation and secret
Information tone secunity;senvice

3. Model for Network Access
Security

Information System

human (e.g., hacker)

software
(e.g., virus, worm)

4. AID PDD ZA AA

Model for Network Access
Security

> using this model requires us to:

; select appropriate gatekeeper functions to
identify users

2 Implement security controls to ensure only
authorised users access designated
information or resources