A Web app encodes $$user$=$AAAA$$ as $$dXNlcj$1$BQUFB$.$ What encoding is this?

a$.$

Base$64$ encoding

b$.$

Hex encoding

c$.$

Unicode encoding

d$.$

URL encoding

Question $16$

The Jetty web server used the Java API java.util.Random to generate session tokens. It generates the next number in the sequence as follows:

Synchronized protected int next $($int bits$)\{$

seed $=($seed $*0$x$5$DEECE$66$DL $+0$xBL$)$ & $((1$L $<<48)-1)$;

return $($int$)($seed $>>>(48$ bits$)\}$

$[$mark all correct answers$]$

a$.$

This algorithm is vulnerable to session token prediction attack

b$.$

This algorithm is not vulnerable to session token predication attack

c$.$

Knowing this algorithm and a single number generated by it$,$ it is very easy to derive the next number generated by this algorithm

d$.$

Knowing this algorithm and a single number generated by it$,$ it is very difficult to derive the next number generated by this algorithm