How does a WEP work?
WEP uses the RC4 algorithm to encrypt the packets of information as they are sent out from the access point or wireless network card. As soon as the access point receives the packets sent by the user’s network card it decrypts them. Each byte of data will be encrypted using a different packet key.
What is WEP attack?
WEP is a stream cipher which relies on never using the same key twice to provide security. Unfortunately, as demonstrated in several published attacks, an attacker is easily able to force the same key to be used twice by replaying network traffic in a way that forces a tremendous amount of packets to be generated.
What is WEP example?
WEP keys are a sequence of hexadecimal values taken from the numbers 0 through 9 and the letters A through F. Some examples of WEP keys are: 1A648C9FE2.
What are WEP characteristics?
Wired Equivalent Privacy WEP characteristics: ■ WEP utilizes a shared-key authentication that allows for encryption and decryption of wireless transmissions. ■ Up to four keys can be defined on an AP or a client, and they can be rotated to add complexity for a higher security standard in the WLAN policy.
How does WEP work for the 802.11 standard?
WEP uses RC4 stream cipher to encrypt data between access point and wireless device. WEP uses 8-bit RC4 and operates on 8-bit values by creating an array with 256 8-bit values for a lookup table (8-bits of 8-bit values). WEP uses CRC for the data integrity.
What is IV in WEP?
An initialization vector (IV) is an arbitrary number that can be used along with a secret key for data encryption. This number, also called a nonce, is employed only one time in any session.
Which cipher is used in WEP?
stream cipher RC4
Encryption details WEP was included as the privacy component of the original IEEE 802.11 standard ratified in 1997. WEP uses the stream cipher RC4 for confidentiality, and the CRC-32 checksum for integrity.
How long is a WEP key?
WEP uses a shared-secret key, which is 40 bits in length. The shared-secret key is concatenated with a 24-bit initialization vector (IV) to create a 64-bit key, which is used to encrypt packets according to the RCA RC4 PRNG algorithm.
Why the WEP used an encryption?
Wi-Fi Alliance developed WEP — the first encryption algorithm for the 802.11 standard — with one main goal: prevent hackers from snooping on wireless data as it was transmitted between clients and APs. From its inception in the late 1990s, however, WEP lacked the strength necessary to accomplish this aim.
What key lengths does WEP support?
What two key sizes does WEP support? 64 and 128 bit.
Which key are used in WEP?
Home Networks WEP uses a shared-secret key, which is 40 bits in length. The shared-secret key is concatenated with a 24-bit initialization vector (IV) to create a 64-bit key, which is used to encrypt packets according to the RCA RC4 PRNG algorithm.
What is key and IV?
An initialization vector (IV) is an arbitrary number that can be used along with a secret key for data encryption. This number, also called a nonce, is employed only one time in any session. The IV length is usually comparable to the length of the encryption key or block of the cipher in use.
