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Spritz---a spongy RC4-like stream cipher and hash function
RC4 Spritz stream cipher
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2016/12/10
We estimate that Spritz can produce output with about 24 cycles/byte of computation. Furthermore, our statistical tests suggest that about 281281 bytes of output are needed before one can reasonably d...
State recovery of RC4 and Spritz Revisited
RC4 Spritz cryptanalysis
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2016/4/7
We provide an improved complexity analysis of backtracking-based state recovery attacks on RC4 and Spritz. Comparing new estimates with known results on Spritz, our analysis shows a significantly lowe...
Cryptanalysis of the Full Spritz Stream Cipher
RC4, Spritz stream cipher short-term bias
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2016/2/23
Spritz is a stream cipher proposed by Rivest and Schuldt at
the rump session of CRYPTO 2014. It is intended to be a replacement of
the popular RC4 stream cipher. In this paper we propose distinguish...
Statistical weakness in Spritz against VMPC-R: in search for the RC4 replacement
PRNG CSPRNG Spritz
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2016/1/5
We found a statistical weakness in the Spritz algorithm designed by Ronald L. Rivest
and Jacob C. N. Schuldt. For N = 8: P rob(output(x) = output(x + 2)) = 1/N + 0.000498. The
bias becomes statistic...
State-recovery analysis of Spritz
Spritz RC4 stream cipher
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2015/12/23
RC4 suffered from a range of plaintext-recovery attacks using
statistical biases, which use substantial, albeit close-to-practical, amounts
of known keystream in applications such as TLS or WEP/WPA....