Scool of Coputer Science Security n Network Min Suer Exintion 2021 

1 Quetion 1 Security n Network Conier RSA encryption wit n 35 wic i prouct of two prie p 5 n q 7 Let e 5 Wt i te plintext correponing to te cipertext 9 Sow your working 10 rk b Aue you contruct MAC by encrypting te ege wit AES in counter oe n tking te lt block of ti encryption I ti goo MAC Jutify your nwer 10 rk Quetion 2 You re reviewing web ppliction for n online op written in PHP for ecurity iue Te web ppliction keep log of te orer Ec log entry i te encryption of pir coniting of te orer etil n te of te orer etil Te web ppliction ue SHA256 of te current Unix tietp retrieve troug tie to generte token to protect gint Cro-Site Requet Forgery CSRF I ti ecure Jutify your nwer 10 rk b Aue te encryption of te log entrie ue AES in counter oe However te rno nuber genertor ue for te counter oe i efective n prouce only 100 ifferent vlue If n ttcker cce to te log n cn crete orer i it poible for te te ttcker to fin te orer etil for t let oe oter orer Jutify your nwer 10 rk Quetion 3 Aue lwre nge to intll new certificte in te brower I it poible for n ttcker wo cn re n oify network trffic to re TLS-encrypte eion wic te brower trt Jutify your nwer 10 rk b A weberver ue TLS for ll connection Doe ti prevent cro-ite-cripting ttck Jutify your nwer 10 rk 2