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RSA.java
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RSA.java
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import java.util.*;
public class RSA {
static Double gcd(Double a, Double h){
Double temp = 0.0;
while(true){
temp = a % h;
if(temp == 0){
return h;
}
a = h;
h = temp;
}
}
public static void main(String Args[]){
Double p = 3.0;
Double q = 7.0;
Double n = p*q;
Double e = 2.0;
Double phi = (p-1)*(q-1);
while(e < phi){
if(gcd(e, phi) == 1){
break;
} else{
e++;
}
}
Scanner sn = new Scanner(System.in);
System.out.print("Enter the number to be envrypted: ");
Double msg = sn.nextDouble();
sn.close();
Double encmsg = Math.pow(msg, e);
encmsg = encmsg % n;
System.out.println("Encrypted Message = " + encmsg);
}
}