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High Quality Content by WIKIPEDIA articles! n cryptography, SOBER
is a family of stream ciphers initially designed by Greg Rose of
QUALCOMM Australia starting in 1997. The name is a contrived
acronym for Seventeen Octet Byte Enabled Register. Initially the
cipher was intended as a replacement for broken ciphers in cellular
telephony. The ciphers evolved, and other developers (primarily
Phillip Hawkes) joined the project. SOBER was the first cipher,
with a 17-byte Linear Feedback Shift Register, a form of decimation
called stuttering, and a nonlinear output filter function. The
particular configuration of the shift register turned out to be
vulnerable to "guess and determine" attacks. SOBER-2 changed the
position of the feedback and output taps to resist the above
attacks. S16 was an expansion to 16-bit words rather than bytes,
with an expected increase of security.
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