If you are a citizen of the United States and are currently residing in the United States with an e-mail address that is verifiably in the United States, then e-mail me to get a copy of Example 3.3 and/or Exercise 3.8 by e-mailing me at pate@wp-lag.mindspring.com Please specify the either dc3.c and/or dc4.c and MIME or UUencoded format for the return e-mail attachment, or request that I put the source code in an e-mail if your system does not handle attachments. You must confirm in writing that are a citizen of the U.S. and currently residing in the U.S. Don't forget to include your e-mail address. The current versions of these differential cryptanalytic programs work on little-endian processors such as the Intel family of processors.