ومع ذلك، فإن التصميم العام تم تسريبه في عام 1994، والخوارزميات تم عكسها هندسياً في عام 1999 من قبل Marc Briceno من GSM الهاتف.
Though both were initially kept secret, the general design was leaked in 1994 and the algorithms were entirely reverse engineered in 1999 by Marc Briceno from a GSM telephone.