cookie is a small amount of data generated by a website and saved by your web browser. Its purpose is to remember information about you, similar to a preference file created by a software application.

1. A
SEMINAR
ON
INTERNET
COOKIES
Presented by:
Rohit Sharma
1211156
B.Tech 4th
yr.
ECE(B1)

2. CONTENTSCONTENTS
 Introduction.
 Why are these files called “ Cookies “ ?
 Cookies Type.?
 Which best describes an internet cookie?
 Whats the point?
 Mmmm!! Cookies.
 The Problem with Cookies.
 Introduction to “Doubleclick Inc.”
 Breakdown of Cookie Parameters ?
 Are cookies Dangerous to my computer?
 Can I delete Cookies?
 Conclusion

3. WHAT ARE COOKIES ?
A cookie is a piece of text that a Web server
can
store on a user's hard disk. Cookies allow a
Web site to store information on a user's
machine and later retrieve it.

4. WHY ARE THESE FILES CALLED “
COOKIES “ ?
A cookie is a well-known computer science term
that is used when describing an opaque piece of
data held by an System.

5. TYPE OF COOKIES
 Persistent Cookie
 Non-Persistent Cookie

6. PERSISTENT COOKIE
 Persistent cookies help websites remember your
information and settings when you visit them in
the future.
 These remain on your hard drive until you erase
them or they expire. How long a cookie remains
on your browser depends on how long the visited
website has programmed the cookie to last.

7. NON-PERSISTENT/SESSION COOKIE
 These are temporary and are erased when you
close your browser at the end of your surfing
session. The next time you visit that particular
site it will not recognise you and will treat you as
a completely new visitor as there is nothing in
your browser to let the site know that you have
visited before.

8. KNOWING THE BASICS:
 In the Business Week survey in 2000, only 40%
of the randomly selected knew what an Internet
cookie was.

9. WHAT’S THE POINT?
 Sites use cookies to…
 Track number of visitors
 First timers vs. returning visitors
 How often the user visits the site.

10. WHERE ARE COOKIES?
 You can find cookie files on your hard drive, your “C”
drive.

11. MMMM! COOKIES…
 They remember usernames for various sites that
require log-in
 Also have the option to remember your passwords for
you!
 They allow you to shop as you browse via online
shopping carts!

12. THE PROBLEMS WITH COOKIES
 Multiple users on the same hard drive
 Family computer, internet cafes
 Credit car7d fraud
 Easily erasable
 Throw off site’s total counts
 Can contain spyware!
 Can pass on personal information without user’s
permission (email address, phone number, credit card
number, etc.)

13. DOUBLECLICK INC.
 Developed cookie program that can follow and
save user internet browsing.
 Such cookie files are saved into text profiles.
 Profiles can be extensive and detailed.
 Serves over 200 billion ads per month.

14. BENEFITS OF DOUBLECLICK:
 Advertisers!
 Allows internet advertisers to place their ads on sites
or pages which will reach their target audiences

15. BREAKDOWN
OF COOKIE
PARAMETERS
As we have just seen, a cookie contains more than simply a name and
a value. In fact, a cookie has 6 parameters that can be passed to it:
 The name of the cookie,
 The value of the cookie,
 The expiration date of the cookie,
 The path the cookie is valid for,
 The domain the cookie is valid for,
 The need for a secure connection to exist to use the cookie.
Two of these are mandatory (its name and its value). The other four
can be set manually or automatically.

16. ARE COOKIES DANGEROUS TO
MY COMPUTER?
Nooooo…..….. A cookie is a
simple piece of text. It is not a program.
It cannot be used as a Virus.Your browser
(not a programmer) can save cookie values to
your hard disk if it needs to, but that is the
limit of the effect on your system.

17. CAN I DELETE
COOKIES?
Yes. Whether you use Internet Explorer or Netscape, your
cookies are saved to a simple text file that you can delete as you
please.
In order to do this properly, remember to close your browser first.
This is because all your cookies are held in memory until you close
your browser. So, if you delete the file with your browser open, it will
make a new file when you close it, and your cookies will be back.
Remember that deleting your cookie file entirely will cause you to
"start from scratch" with every web site you usually visit. So, it may be
preferable to open the cookies.txt file and remove only the entries you
don't like, or go to the cookies folder and delete the files matching
servers you don't want.

18. Cookies are user friendly.Cookies are not
harmful for your system. They just store your
data/information,you can privately access later.
Cookies remains alive in your system with your
information as long as it’s expiry time or may die
after your browser close.
Cookies are user friendly.Cookies are not
harmful for your system. They just store your
data/information,you can privately access later.
Cookies remains alive in your system with your
information as long as it’s expiry time or may die
after your browser close.
CONCLUSIONCONCLUSION

19. Thank
You!!
Question
s…
?
Thank
You!!
Question
s…
?