Implement RC4 in Matlab from the 2 code examples below:

function [ S ] = KSA( key )

key = char(key);

key = uint16(key);

key_length = size(key,2);

S=0:255;

j=0;

for i=0:1:255

j = mod( j + S(i+1) + key(mod(i, key_length) + 1), 256);

S([i+1 j+1]) = S([j+1 i+1]);

end

end

function [ key ] = PRGA( S, n )

%S is the result from KSA function

%n number of characters to be encrypted

i = 0;

j = 0;

key = uint16([]);

%each iteration we will append one key value

while n> 0

n = n - 1;

i = mod( i + 1, 256);

j = mod(j + S(i+1), 256);

S([i+1 j+1]) = S([j+1 i+1]);

K = S( mod( S(i+1) + S(j+1) , 256) + 1 );

key = [key, K];

end

end