3. Wikipedia says...
...a cookie is used for an origin
website to send state information to a user's
browser and for the browser to return the state
information to the origin site
4. Typical flow
Go to URL
Read Cookie
Yes
Is Cookie Write new Cookie
No Empty?
Use Cookie info
Update Cookie info
5. Unique Cookies
47,908
382,576
13,489 12,246 11,219
10,580 9,895 4,372
Source: Feb 2012 statistics by cookielaw.org
7. Cookies cannot...
Automatically access to personal information
Read or write data to hard disk
Read or write information in cookies placed by
other sites
Run programs on your computer
8. Cookies can...
Store any information you explicitly provide to a
site
Track your interaction with parent site such as
pages visited, time of visits, number of visits
9. Max 4Kb in size
3 imp Attributes: Name,Value,Expiry
300 cookies per browser
10. Cookies are used for...
User Tracking Session Management
Personalization
20. Cookies and UK
26th May 2011, the Cookie law
Obtain informed consent from visitors
82% of digital marketers think the EU cookie law is bad for the web
- eConsultancy.com
21. The ICO case
“Websites face £500k fine for
breaching ‘cookie’ law“