Hi all,

The following program creates an RSA key pair and prints
the length of its public key modulus. Eventhough I have
initialized its size as 1024(128 bytes), the printed length is
129. What is behind this behavoiur..?

public static void main(String args[]){
   KeyPairGenerator kpg = null ;
   try{
       kpg = KeyPairGenerator.getInstance("RSA");
       kpg.initialize(1024);
   }catch(Exception e){
       e.printStackTrace();
   }
   KeyPair kp = kpg.genKeyPair();
   RSAPublicKey puKey = (RSAPublicKey)kp.getPublic();
   System.out.println("Key
Length:"+puKey.getModulus().toByteArray().length);
}

regards
Sijo