After the initial design was broken by Joux and Muller, a tweaked version named MOUSTIQUE was proposed which made it to Phase 3 of the eSTREAM evaluation process as the only self-synchronizing cipher remaining. However, MOUSTIQUE was subsequently broken by Käsper et al., leaving the design of a secure and efficient self-synchronising stream cipher as an open research problem.
After the initial design was compromised by Joux and Muller, a modified version called MOUSTIQUE was proposed, which advanced to Phase 3 of the eSTREAM evaluation process as the sole self-synchronizing cipher remaining. However, MOUSTIQUE was subsequently broken by Käsper et al., leaving the design of a secure and efficient self-synchronizing stream cipher as an open research issue.