Wired Equivalent Privacy (WEP) is a security algorithm for IEEE 802.11 wireless networks. The standard does not design any automatic key distribution mechanism that forces the key to write the key manually on each network element. Since wireless networks transmit data over radio waves, it is easy to intercept data or "eavesdrop" on wireless data transmissions. Ideally, IV should never be repeated, but as we have seen, this is impossible in WEP. Increasing the length of the secret key does not solve the weakness of IV.If several frames with the same IV have been captured, that is, with the same keystream, you only need to know the unencrypted message that does XOR between an unencrypted message and the same encryption that will give us the mainstream for IV.By knowing the key flow associated with an IV, you can decrypt all frames using the same IV. This CRC-32 is the recommended method to guarantee the integrity of messages (ICV, Integrity Check Value).It is a Flow Encryption (not block) algorithm created in 1987 by Ronald Rivest (RSA R-RSA Data Security Trade Secret). When a station tries to connect to an access point, it is duplicated with random text, which is the challenge. The 802.11 standard does not specify how the private key is set but allows a table to associate a unique key with each station. WEP stands for Wired Equivalent Privacy, a Wi-Fi wireless network security standard.
WEP was at one time the only widely-supported standard for protecting home Wi-Fi networks against sniffer attacks. As the name suggests, WEP technology was created to protect Wi-Fi networks up to the equivalent levels that Ethernet networks had been protected. It is also a critical element to ensure access control through authentication mechanisms as well as to guarantee the confidentiality and integrity of data in WLAN systems based on the 802.11 standard. This weakness can cause unauthorized access, especially if the system contains a large number of users.
Also, considering that each station uses the same secret key, the squares with the same key are multiplied in the middle. In general practice, however, the same key is shared between all stations and access points in a particular system.To protect the encrypted text from unauthorized changes during transmission, WEP applies an integrity checking algorithm (CRC-32) that generates an integrity check value (ICV) to plain text.
The purpose of WEP is to encrypt data carried by radio signals to ensure that WLAN systems have a level of privacy equivalent to that of wired LAN networks.
The higher the network load, the less time will be.
Network administrators choose which WEP keys to use on a network. As transfers pass through an unsafe environment, mechanisms are necessary to ensure the integrity and originality of the data as well as its confidentiality.Despite its potential strength in the IEEE 802.11 standard to provide security and protect data privacy and integrity, there are a number of limitations that can only be avoided by proper management.
It is a standard encryption system implemented on MAC and supported by most wireless solutions. As a result, WEP protection today can be violated with easily accessible software within minutes.
Although it was not specifically designed for WLAN networks, The mechanisms specifically designed to be the successor of WLAN networks are WPA and WPA2 (IEEE 802.11i). Despite its weaknesses, it continues to be used as it is the first security option offered to users by router configuration tools, which can only prevent unauthorized users from a private network, but without providing real protection, but only a level of security. The more users, the more likely the shared key will get into the wrong hands.According to the standard, WLAN networks should provide privacy, authentication and access control.
If the IV value is not changed regularly but is used for subsequent messages, a listener can encrypt the IV value and the key flow generated by the secret key, thereby decrypting messages using that value; it becomes even more critical if all terminals are configured with the same keys.
In a shared key system, only stations with an encrypted key are authenticated.The 802.11 standard specifies an optional encryption feature; its purpose is to create a security level similar to that of wired networks. Wired Equivalent Privacy (WEP) is considered as a form of security protocol that was designed in order to provide a level of security and privacy to a wireless local area network (W LAN) comparable to what is normally expected of a wired local area network.
WEP is an optional security algorithm that is included in the first version of the IEEE 802.11 standard and provides protection to wireless networks kept unchanged in the new 802.11a and 802.11bto guarantee compatibility between different manufacturers.
A WEP key is a security passcode for Wi-Fi devices. Choosing which protocol to use for your own network can be …
A requesting network station can authorize any station or only stations on a predefined list.
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