1. Encryption example Scrambling of the representation Using Exclusive OR, XOR,  If bits are the same, result is 0; if different 1 Apply a key to the plain or clear text

2. Encryption example 0101 Cleartext  1001 Key 1100 Encrypted text XOR is its on reverse 1100 Encrypted text  1001 Key 0101 Decrypted-Cleartext

3. Encryption example If the cleartext is 1101 and the XOR key is 1001, what is the encrypted text? 1101  1001 0100

4. Assignment Using XOR and 10110110 determine the encrypted results for the ASCII text THE MAGIC WORDS Read Chapter 5, sections 1 and 2 What drives do you have on your PC? What media capacity do they provide? Identify safe handling techniques for portable media: do’s and don'ts