Answer the following:

Question

(a) How do you differentiate between privacy and security?
(b) What are the differences between authentication and encryption?

Answer 1

(a) Privacy is something that will only interest “those with something to hide”. Security is a necessary tool to build privacy, but a communication or transaction environment can be very secure, yet totally not private. Security and privacy are closely related technologies. However, there are important differences that need to be understood in order to design new systems that address both. Privacy is about informational self-determination (i.e., the ability to decide which information about goes where). Security offers the ability to be confident that those decisions
are respected. For example, we talk about GSM voice privacy- can someone listen to my call? There is a privacy goal, which is to allow me to say no, and a security technology, encryption, that allows me to enforce it. In this example, the goals of security and privacy are the same. But, there are other times when they may be orthogonal, and there are also times when they are in conflict.
(b) Encryption is the process of hiding the data that others can’t understand. Authentication means a way to grant or remove the right for others to access the data.