In 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 (LFSR), 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.
Msanii Mkongwe Rashidi Abdallah Mohamed Makwiro maarufu kama Chidi Benzi ameruhusiwa kurejea uraiani na Mamlaka ya Kudhibiti na Kupamba na Dawa za Kulevya wakishirikiana na Baraza la Sanaa la Taifa walioshiriki kumpeleka katika Nyumba ya Matibabu kwa walioathirika na Madawa ya Kulevya (Sober...
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