Summary Day by Day data is increasingly, due to rapid development of data we need to specify some methods to protect our data from unauthorized users. For this we use encryption and decryption techniques and studying different methods. These Notes cover all basic

Information Security

Mamoona Jabbar

, Secure Design

The core pillars of information security:

Confidentiality – only allow access to data for which the user
is permitted
Integrity – ensure data is not tampered or altered by
unauthorized users
Availability – ensure systems and data are available to
authorized users when they need it

, Security Principles
The security principles outlined in Michael Howard and David
LeBlanc’s book Writing Secure Code

• Minimize attack surface area
• Establish secure defaults
• The principle of least privileges
• The principle of defence in depth
• Fail securely
• Don’t trust services
• Separation of duties
• Avoid security by obscurity
• Keep security simple
• Fix security issue correctly