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How can I decrypt cookie file?

Jul 29, 2008
If you found cookie folder on your computer you can open any cookie with the Notepad. But you will find that its impossible to read it. It contain many numbers, domain name, some text. Sometimes its looks like human text, sometimes just bla-bla-bla.

When web site send you the cookie it chooses format of it. However, all coookies contain the following: domain name to which this cookies assigned and expiration date. You can see it in cookie in plain text. Some browsers like Opera lets you manage cookies with all details, others will not.

The rest part of the cookie is a pairs of key and value. For example VISIT=1 or NAME=JOHN... Any information that you have provided to the web site can be stored in the cookie that way. However, for top security web site can encode cookie using any algorithm they like. In this case you will see something like ID=hhiw87hBGVtyfhjsjh... And nothing else. This is good protected cookie. And there is no way to decrypt it, its made to be secure.

To just read cookies (as is) use special software mentioned in this article above. To convert cookies for easy reading you will need to replace code character 10 with code character 10+13 (vbCRlf or end of line). However, remember, there is no way to read data which is encrypted in the cookie because there is thousands of security algorithms and its unknown which one used by web site that owns cookie.

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