▁That ▁is ▁the ▁goal ▁of ▁secret ▁key ▁agreement . ▁ ▁In ▁this ▁line ▁of ▁work , ▁started ▁by ▁Ma urer ▁and ▁A hl sw ede ▁and ▁Cs isz ár , ▁the ▁basic ▁system ▁model ▁removes ▁any ▁restriction ▁on ▁the ▁communication ▁schemes ▁and ▁assumes ▁that ▁the ▁legit imate ▁users ▁can ▁communicate ▁over ▁a ▁two - way , ▁public , ▁no is eless , ▁and ▁authentic ated ▁channel ▁at ▁no ▁cost . ▁This ▁model ▁has ▁been ▁subsequently ▁extended ▁to ▁account ▁for ▁multiple ▁users ▁and ▁a ▁no isy ▁channel ▁among ▁others . ▁ ▁See ▁also ▁▁ ▁Le f to ver ▁hash ▁lemma ▁( priv acy ▁ampl ification ) ▁ ▁Sem antic ▁security ▁ ▁References ▁ ▁Category : The ory ▁of ▁crypt ography <0x0A> </s> ▁The ▁Men ' s ▁National ▁Colleg iate ▁Athlet ic ▁Association ▁is ▁an ▁athlet ic ▁association ▁in ▁the ▁Philippines , ▁and ▁is ▁the ▁direct ▁counter part ▁of ▁the ▁older ▁Women ' s ▁National ▁Colleg iate ▁Athlet ic ▁Association ▁( f ounded ▁in ▁ 1 9 7 0 ). ▁The ▁Men ' s ▁National ▁Colleg iate ▁Athlet ic ▁Association ▁( M N CAA ) ▁is ▁exclusive ▁for ▁men . ▁The ▁M N CAA ▁was ▁founded ▁in ▁ 2 0 0 4 . ▁Compet ition ▁is ▁divided ▁into ▁three ▁divisions : ▁Sen iors ▁for ▁college ▁students , ▁Juni ors ▁for ▁high ▁school ▁students , ▁and ▁M idget s ▁for ▁grade ▁school ▁and ▁first ▁year ▁high ▁school ▁students . ▁The ▁compet ing ▁sports ▁of ▁the ▁tournament ▁are ▁Basketball , ▁Vol ley ball , ▁F uts al