please help me answer all the question e-commerce

1. Explain the following e-commerce security requirements: a) Authentication b) Authorization

2. The security of e-commerce can be measured by confidentiality, integrity and availability of information at the business website. Define each component.

3. You are planning to start an online business that sells musical instruments. Explain the most basic form of authentication method that you would use to verify your customers. What could be the potential threats to your customers when they access your website?

4. Explain the following security threats in e-commerce: a. Identity theft b. Page hijacking c. Phishing attack d. Credit card fraud e. Denial of service attack