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OpenID-Attacker is a free open source security testing tool for the Single Sign-On Protocol OpenID ( It is developed by the Chair of Network and Data Security, Ruhr University Bochum ( ) and the 3curity GmbH ( ).


You can build OpenID-Attacker directly from the Github sources. For this purpose, you need:

  • Java 8 or higher
  • maven
  • git

You procede as follows. You first need to clone OpenID-Attackers sources (you can of course also download a ZIP file):

$ git clone 

Then you go to the OpenID-Attacker directory and use maven to build and package the files:

$ cd OpenID-Attacker
$ mvn clean package -DskipTests

Afterwards, you are able to go to the runnable directory and execute OpenID-Attacker:

$ cd runnable
$ java -jar OpenID-Attacker-*.jar


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