Re: Detecting/estimate whether data is encrypted

[xiandu () latech edu]

I wonder the detection of encrypted data is also a kind of anomaly  
detection problem. How about trying a variety of anomaly/outlier  
detection techniques, such as one-class SVM, random forest,...

Flase positive should be a common problem for all anomaly detection  
techniques.

good luck
xian
Quoting chris <chricki () gmx net>:

> Hi list,
>
> For the purpose of some research, I'd like to check if (or how likely) a
> piece of data is encrypted. I'm particularly interested in analyzing
> whether network traffic is encrypted. To make things easier: I don't
> mind which algorithm and/or key lengths are used, but just would like
> express on a scale from 0% to 100% how likely the data is encrypted.
>
> Some brainstorming led me to the conclusion that measuring the entropy
> of data may be a good start. Drawback: there may be false positives,
> mostly due to compression).
>
> Any other ideas?
>
> Thanks in advance,
> Chris
>
>
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Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
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