Computer Security and Cryptography

ACKNOWLEDGMENTS

I am in debt to many people, who have helped and encouraged me in the writing of this book:

• My colleague and friend of 46 years, Dr. Roy L. Adler, recently retired from the Mathematical Sciences Department of the IBM Thomas J. Watson Research Center (Yorktown Heights, New York), who read chapters and provided me with considerable material on the cryptographic work at IBM.
• My colleague and friend of 36 years, Dr. Raymond Pickholtz, Professor Emeritus at George Washington University, who visited UCSB several times, read all of the chapters and provided advice.
• Mr. I. Benjamin Blady and Mrs. Sara Beth Mitchell, who were kind enough to edit Chapter 19 on Patents in Cryptography.
• My son Keith, who helped me with graphics; together with my son Jay, he simplified my transition from MAC to PC; and my son Seth, who read early chapters and wisely urged me to moderate my wit.

and

• Carol, my wife of nearly 50 years, who continues to amaze me by her wide-ranging talents. I could not have undertaken this book without her encouragement, assistance, and advice.

I have offered CMPSC 178 twenty-one times at UCSB and once each in Australia, Israel, and Hawaii. One benefits from the questions, advice, and criticisms of students. In Penses, Essais, Maximes et Correspondanee de J. Joubert, in 1842, the French philosopher Joseph Joubert wrote

To teach is to learn twice.

Santa Barbara, CaliforniaApril 2006

ALAN G. KONHEIM