Explain the difference between a private key and a secret key.

Assignment 1 (4×25=100 points)

Please submit this assignment using Word or PDF.

1. Explain the difference between an attack surface and an attack tree. (At least 1 paragraph)

2. Explain the difference between a private key and a secret key. (At least 1 paragraph)

3. Describe and explain, at least, seven different physical characteristics that are used for authentication in biometric applications. (At least half a page)

4. Explain Federated Identity (Identity Federation), how it is different from Single Sign-On (SSO) and give an example of how it is used commercially. (At least half a page).