In other words, flipping bit n in the message results Of two CRCs based on the bit difference of the messages over which Linear, which means that it is possible to compute the bit difference Is part of the encrypted payload of the packet. The integrity check field is implemented as a CRC-32 checksum, which Implemented incorrectly, resulting in poor security. Shared secret key and produce a different RC4 key for each packet. Same key stream, an Initialization Vector (IV) is used to augment the To avoid encrypting two ciphertexts with the Packet has not been modified in transit, it uses an Integrity Check WEP has defenses against both of these attacks. Once one of the plaintexts becomes known, it is trivial to recover all Practical as more ciphertexts that use the same key stream are known. The statistical attacks become increasingly Knowledge of this XOR can enable statistical attacks to Same key stream, it is possible to obtain the XOR of the two If an attacker flips a bit in the ciphertext, then uponĭecryption, the corresponding bit in the plaintext will be flipped.Īlso, if an eavesdropper intercepts two ciphertexts encrypted with the This mode of operation makes stream ciphers vulnerable to severalĪttacks. Stream with the ciphertext yields the original plaintext. Same key, and uses it to generate identical key stream.
A stream cipher operates by expanding a short key into an WEP uses the RC4 encryption algorithm, which is known as a streamĬipher. Of traffic, allows real-time automated decryption of all traffic.Īn excerpt from their paper about the technical problems with WEP:
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