System security in cryptography and network security ppt

Define five security services to prevent security attacks— data confidentiality, data integrity, authentication, non-repudiation and access control. steganography. cryptography and show how confidentiality can be provided using either symmetric-key or asymmetric-key ciphers.
Network Security involves access control, virus and antivirus software, application security, network analytics, types of network-related security (endpoint, web, wireless), firewalls, VPN encryption and more.

The process of converting a message into a secret code called CIPHER TEXT, and changing the encoded message back to regular text called PLAIN TEXT.

What is security? Security is the act of protecting a person, property or organization from an attack. Examples of attack on a person?