Web sites typically use cookies for the following reasons:
1. To collect demographic information about who has visited the Web site.
2. Sites often use this information to track how often visitors come to the site and how long they remain on the site.
3. It helps to personalize the user's experience on the Web site.
4. Cookies can help store personal information about users so that when a user subsequently returns to the site, a more personalized experience is provided.

Main In The Middle (MITM) :
Man-in-the-middle attack (MITM; also Janus attack) is an attack where the attacker secretly relays and possibly alters the communication between two parties who believe they are directly communicating with each other.
Example:
Suppose Alice wishes to communicate with Bob.
Mean while, Mallory wishes to intercept the conversation to overhear and optionally to deliver a false message to Bob.

Phishing:
1. Phishing is a type of computer crime used to attack, steal user data, including login name, password and credit card numbers. It occurs when an attacker targets a victim into opening an e-rnailer an instant text message.
2. The attacker uses phishing to distribute malicious links or attachments that can perform a variety of functions including the extraction of sensitive login credentials from victims.

UNAUTHORIZED ACCESS:
1. Unauthorized access is when someone gains access to a website, program, server, service, or other system by breaking into a legitimate user account.
2. For example, if someone tries guessing a password or user name for an account that was not theirs until they gained access, it is considered an unauthorized access.

GUIDELINES OF ETHICS:
Generally, the following guidelines should be observed by computer users:
1. Honesty: Users should be truthful while using the internet.
2. Confidentiality: Users should not share any important information with unauthorized people.
3. Respect: Each user should respect the privacy of other users.
4. Professionalism: Each user should maintain a professional conduct.
5. Obey The Law: Users should strictly obey the cyber law in computer usage.6.
6. Responsibility: Each user should take ownership and responsibility for their actions.