![]() The basic problem with WEP is that it uses a cipher not suitable for the environment it operates in. Once the restrictions were lifted, manufacturers of access points implemented an extended 128-bit WEP protocol using a 104-bit key size (WEP-104).Ī standard WEP key is usually entered as a set of 10 hexadecimal characters and each character encodes 4 bits. Government's export restrictions on cryptographic technology limited the key size. At the time that the original WEP standard was drafted, the U.S. An initialization vector is a fixed-size input that is required to be random or pseudo-random in order to ensure that multiple instances of the same plaintext encrypts to different ciphertext. Standard 64-bit WEP uses a 40 bit key (also known as WEP-40), which is concatenated with a 24-bit initialization vector (IV) to form the RC4 key. It uses the stream cipher RC4 for confidentiality and CRC32 for data integrity. WEP stands for Wired Equivalent Privacy and is an encryption technique introduced in 1997 to help protect wireless networks against snooping and provide confidentiality similar to a wired network. As always, you can use Kali Linux, but the guide is tailored on Ubuntu 14.04, which runs on the Odroid-C1. These tests serve to help you test your own network security and discover weak spots before real attackers do. Only try the following experiments on networks that you own and where you have permission from the network administrator. Of course, as you should already know by now, performing these types of attacks and trying to break encryption is a criminal offense and is punishable by the law in most places. In this article we will start attacking the encryption of wireless networks. In my previous articles we learned how wireless networks work and how they can be disrupted using simple techniques and tools.
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