2 0 0 0 ▁C rypt analysis ▁of ▁the ▁A 5 / 1 ▁stream ▁ci pher ▁used ▁in ▁G SM ▁cell ph ones ▁( with ▁Alex ▁B iry uk ov ▁and ▁Ad i ▁Sh am ir ). ▁▁ 1 9 9 9 ▁C rypt analysis ▁of ▁Microsoft ' s ▁P P TP ▁t unn elling ▁protocol ▁( with ▁Bruce ▁Schne ier ▁and ▁" M ud ge "). ▁▁ 1 9 9 9 ▁In vention ▁of ▁the ▁slide ▁attack , ▁a ▁new ▁form ▁of ▁crypt analysis ▁( with ▁Alex ▁B iry uk ov ); ▁also ▁the ▁bo omer ang ▁attack ▁and ▁mod ▁n ▁crypt analysis ▁( the ▁latter ▁with ▁Bruce ▁Schne ier ▁and ▁John ▁K else y ). ▁▁ 1 9 9 8 ▁Development ▁of ▁Two fish ▁block ▁ci pher , ▁which ▁was ▁a ▁final ist ▁for ▁N IST ' s ▁Advanced ▁Enc ryption ▁Standard ▁competition ▁( with ▁Bruce ▁Schne ier , ▁John ▁K else y , ▁Doug ▁Wh iting , ▁Chris ▁Hall , ▁and ▁N iels ▁Fer g us on ). ▁▁ 1 9 9 7 ▁C rypt anal yz ed ▁the ▁C ME A ▁algorithm ▁used ▁in ▁many ▁U . S . ▁cell ph ones ▁( with ▁Bruce ▁Schne ier ). ▁▁ 1 9 9 5 ▁ ▁Disc over ed ▁a ▁f law ▁in ▁the ▁implementation ▁of ▁SSL ▁in ▁N ets cape ▁N avigator ▁( with ▁Ian ▁Gold berg ). ▁ ▁References ▁ ▁External ▁links ▁ ▁Professor ▁Wagner ' s ▁home ▁page ▁ ▁David ▁Wagner ▁election ▁research ▁papers ▁ ▁Some ▁of ▁Wagner