Before We Get Started

What is Cryptology?

Cryptology is a study of techniques consisting of the techniques required for ensuring the authenticity and confidentiality of the information.
Cryptology has two main branches;
- Cryptography
                         Which literally means hidden writing. It's the study of the design of such techniques.

- Cryptanalysis
                         Which deals with the analysis of these techniques, to recover the information, which is authentic.

What is Network Security?

Network security is making use of cryptographic algorithms in network protocols and network applications in an order to ensure their security.

What is Computer Security?

Computer security is the security of computers against hackers and malicious software/viruses.

The OSI Security Architecture

The OSI(Open Systems Interconnection) security architecture provides a systematic framework for defining security attacks, mechanisms and services.

Security Attacks

Attacks to breach or threaten the security are known as security attacks.
There are two types of security attacks;
1. Active Attacks
     These attacks include modifying the information without authorization.
2. Passive Attacks
     These attacks include unauthorized monitoring of the information.

Security Mechanism

Any mechanism that is designed to detect, prevent, or recover from security attack. Example: authentication protocols, encryption algorithms, etc.

Security services

Security services include data confidentiality, access control, authentication, non-repudiation, data integrity, and availability.