WEP
- Wire-Equivalent Privacy (WEP) encrypts traffic with RC4 Symmetric streaming encryption
- Uses a shared key, which is combined with a "24-bit Initialization Vector" to make the final encryption key 64 or 128 bits long
- NOT SECURE
- The 24-bit IV is limited to 16.7 million values (2^24), which can easily be repeated on a busy network
- Compare to AES minimum encryption key length of 128 bits, with 340 tredecillion values (2^128)
- WEP implementations often reused IVs, which made it easier to predict and decrypt
- TKIP was implemented as a stop-gap for WEP
- It doubled the IV from 24 to 48 bits as a stop-gap
- It used a Key Mixing Algorithm to create unique WEP keys for each frame
OSI or TCP/IP Layer
CCNA Exam Topic
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