SOBER-128 is a synchronous stream cipher designed by Hawkes and Rose (2003) and is a member of the SOBER family of ciphers. SOBER-128 was also designed to provide MAC (message authentication code) functionality. Watanabe and Furuya (2004) showed a weakness in the MAC generation of SOBER-128 which means an attack could forge a message with probability 2−6. MAC functionality was deleted by Qualcomm from SOBER-128 reference code. SOBER-128 takes a key up to 128 bits in length. See also Helix Turing References Dai Watanabe and Soichi Furuya, A MAC Forgery Attack on SOBER-128, FSE 2004. pp472–482. Philip Hawkes and Greg Rose, Primitive Specification for SOBER-128, IACR ePrint archive, 2003. External links SOBER 128 page at Qualcomm Open Source Broken stream ciphers Stream ciphers