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Zombie cookies<br />Abdul Rahman Al-Mudaiheem<br />
Table of content<br />What are Zombie Cookies? <br />Differences between them & regular cookies.<br />How do they work exa...
What Are zombie cookies?<br />They are cookies that rise from the dead come back to life after you kill delete them.<br />...
Differences between them & regular cookies.<br />
How do they work exactly?<br />What you think happens: <br />You visit a website. <br />They plant browser Cookies.<br />Y...
How do they work exactly?<br />What REALLY happens (in some cases): <br />You visit a website. <br />They plant browser Co...
Who used them?<br />that is just for starters. It isn’t even the tip of the iceberg when it comes to who is hiding zombie ...
Purposes of using them.<br />Marketing Research <br />Tracking personal browsing habits. <br />Since Zombie cookies have a...
Privacy Breach<br />Fact: almost 98% of computers have Adobe Flash, which means almost everyone is exposed to Zombie Cooki...
How to kill them?<br />Before: <br />You had to uninstall Adobe Flash, and re-install it. <br />Now: <br />Go to Adobe’s w...
That’s it <br />Thank you.<br />
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Zombie Cookies

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Zombie Cookies..... WHAT?
All you need to know about these special kind of cookies, and how you can handle them.

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Transcript of "Zombie Cookies "

  1. 1. Zombie cookies<br />Abdul Rahman Al-Mudaiheem<br />
  2. 2. Table of content<br />What are Zombie Cookies? <br />Differences between them & regular cookies.<br />How do they work exactly? <br />Who used them?<br />Purposes of using them. <br />Privacy Breach.<br />How to kill them?<br />
  3. 3. What Are zombie cookies?<br />They are cookies that rise from the dead come back to life after you kill delete them.<br />It was first identified by UC Berkley<br />They noticed that they were deleting cookies, but they kept coming back over and over again. <br />No amount of deleting them would kill them. <br />Many people have absolutely no idea what a zombie cookie is, or that they even exist. <br />Until a massive lawsuit in 2009, which targeted some of the biggest names on the web. Because of breach of privacy (More on that later).<br />
  4. 4. Differences between them & regular cookies.<br />
  5. 5. How do they work exactly?<br />What you think happens: <br />You visit a website. <br />They plant browser Cookies.<br />You visit the website again, and they retrieve those cookies. <br />You can block them or delete them.<br />And that’s that. <br />
  6. 6. How do they work exactly?<br />What REALLY happens (in some cases): <br />You visit a website. <br />They plant browser Cookies AND Adobe Flash cookies. <br />You block or delete regular cookies. Doesn’t matter!<br />You visit the website again, they check for regular cookies.<br />No luck? <br />They check for Adobe Flash cookies, which are EXACTLY the same, if not even more detailed (remember 4kb vs. 100kb)<br />So in a sense, you deleting or blocking browser cookies doesn’t matter. Because Zombie cookies are there. <br />
  7. 7. Who used them?<br />that is just for starters. It isn’t even the tip of the iceberg when it comes to who is hiding zombie cookies on your computer. <br />
  8. 8. Purposes of using them.<br />Marketing Research <br />Tracking personal browsing habits. <br />Since Zombie cookies have a bigger size, they store more, detailed information about users’ behavior. <br />Remember unique visitors. <br />Preferences, such as video volume or page layout, are saved, no matter what browser you use. <br />When a site bans a user, he/she will still be banned even if you delete browser cookies or use different browsers.<br />
  9. 9. Privacy Breach<br />Fact: almost 98% of computers have Adobe Flash, which means almost everyone is exposed to Zombie Cookies.<br />Some people feel that if you delete or block a cookie, it should stay deleted. <br />But since Zombie cookies are not affected by regular deletion of cookies, people consider sites that use them to be breaching their privacy. <br />A huge lawsuit was filed against Clearspring and affiliated sites owned by Walt Disney Internet Group, Warner Bros and others. It said that Adobe Flash cookies, a type of zombie cookie, are planted to "track Plaintiffs and Class Members that visited non-Clearspring Flash Cookie Affiliates websites by having their online transmissions intercepted, without notice or consent".<br />
  10. 10. How to kill them?<br />Before: <br />You had to uninstall Adobe Flash, and re-install it. <br />Now: <br />Go to Adobe’s webpage and set controls on the Global Privacy Settings page (Google this for more details).<br />. If you use Firefox you can get rid of Flash cookies - including zombie cookies- by using theBetterPrivacy add-on. <br />
  11. 11. That’s it <br />Thank you.<br />
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