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The use of RC4 (stream cipher) in Conficker rather than AES.

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Which algorithm you prefer for encrypting critical documents?
AES (Rijndael)-128 bit
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AES-256 bit
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 0%  [ 0 ]
Blowfish
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 0%  [ 0 ]
Twofish
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 0%  [ 0 ]
RC4
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 0%  [ 0 ]
RC6
0%
 0%  [ 0 ]
Serpent
100%
 100%  [ 1 ]
CAST-128
0%
 0%  [ 0 ]
Triple-DES
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Other
0%
 0%  [ 0 ]
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rpk2006
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PostPosted: Mon Jan 03, 2011 5:57 pm    Post subject: The use of RC4 (stream cipher) in Conficker rather than AES. Reply with quote

I wonder why the authors of Conficker worm used RC4 stream cipher instead of any block cipher like AES. Secondly, the new variants of Conficker using MD6 hashing mechanism instead of any of the SHA categories.

Is it because of the size of the encrypted data or the speed?
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