AirSnort Homepage

This software is OLD

It is no longer maintained or supported. Besides, there are much better tools out there. You really should be trying something like aircrack-ng.


Download Airsnort here.
Snax's GPG key

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AirSnort is a wireless LAN (WLAN) tool which recovers encryption keys. AirSnort operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered.

802.11b, using the Wired Equivalent Protocol (WEP), is crippled with numerous security flaws. Most damning of these is the weakness described in " Weaknesses in the Key Scheduling Algorithm of RC4 " by Scott Fluhrer, Itsik Mantin and Adi Shamir. Adam Stubblefield was the first to implement this attack, but he has not made his software public. AirSnort, along with WEPCrack, which was released about the same time as AirSnort, are the first publicly available implementaions of this attack.

AirSnort requires approximately 5-10 million encrypted packets to be gathered. Once enough packets have been gathered, AirSnort can guess the encryption password in under a second.

AirSnort 0.2.6 Requirements

AirSnort runs under Windows or Linux, and requires that your wireless nic be capable of rf monitor mode, and that it pass monitor mode packets up via the PF_PACKET interface. Cards known to do this are:

For Linux users, the best resources for finding out if your card can do monitor mode and what drivers you will need are those maintained at the Kismet site.

To compile AirSnort, do the following:

Orinoco Notes: The latest patches seem to smooth things out for all versions of Orinoco firmware. Please make sure you are using the latest patches. If you do not see a patch for your version of pcmcia-cs, then PLEASE determine what version of the orinoco drivers are included with your version of pcmcia-cs and get the appropriate orinoco-0.XX patches.  To do this look in pcmcia-cs-X.Y.Z/wireless/orinoco_cs.c which will list the version number in the first couple of lines.


Anonymous CVS is at the CVSROOT . For more information, view our SourceForge page.

Download the tarballs from Sourceforge

Apple iBook Info

See Erik Winkler's iBook page for more information.

Contact Us

Email Snax with questions, comments, suggestions and patches. Jeremy and Blake are semi-retired from the project.

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