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    copied!<p>@jwd, @jscode Thanks a lot for your help. To jwd: I got the idea from your code. Seemed pretty simple logic after I read it.. :-) Wonder why I didnt think of that. Well, I did polish your idea a little bit and it works fine now in Java. If anyone has any suggestions, please let me know. THANKS.. P.S.: The testing part is very primitive. I print the bit values. I did it manually for a couple of examples and used the same as input and it works fine.</p> <p>=============================================</p> <pre><code>public static void main(String[] args) { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); System.out.println("Enter an 8 char key: "); String input; try { // get key, key.length()&gt;=8 chars input = br.readLine(); if (input.length() &lt; 8) { System.out.println("Key &lt; 8B. Exiting. . ."); System.exit(1); } // java char has 16 bits instead of 8 bits as in C, // so convert it to 8 bit char by getting lower order byte &amp; // discarding higher order byte char[] inputKey = input.toCharArray(); byte[] key64 = new byte[8]; byte[] key56 = new byte[7]; // consider only first 8 chars even if input &gt; 8 for (int counter = 0; counter &lt; 8; counter++) key64[counter] = (byte) inputKey[counter]; System.out.print("\n$$ " + new String(key64) + " $$\n"); // converting 64bit key to 56 bit key for (int counter = 0; counter &lt; KEY_LENGTH - 1; counter++) { key64[counter] = (byte) (key64[counter] &gt;&gt;&gt; 1); key64[counter] = (byte) (key64[counter] &lt;&lt; 1); } for (int counter = 0; counter &lt; KEY_LENGTH - 1; counter++) { key56[counter] = (byte) (key64[counter] &lt;&lt; counter); key56[counter] = (byte) (key56[counter] | (key64[counter + 1] &gt;&gt;&gt; (KEY_LENGTH - 1 - counter))); } /*Conversion from 64 to 56 bit testing code System.out.println(new String(key56)); System.out.println(); for (int counter1 = 0; counter1 &lt; 7; counter1++) { for (int counter2 = 7; counter2 &gt;= 0; counter2--) { System.out.println(key56[counter1] &amp; (1 &lt;&lt; counter2)); } System.out.println(); }*/ } catch (IOException e) { e.printStackTrace(); } } </code></pre>
 

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