Codes and Ciphers Julius Caesar the Enigma and the Internet

The design of code and cipher systems has undergone major changes in modern times. Powerful personal computers have resulted in an explosion of e-banking, e-commerce and e-mail, and as a consequence the encryption of communications to ensure security has become a matter of public interest and importance. This book describes and analyses many cipher systems ranging from the earliest and elementary to the most recent and sophisticated, such as RSA and DES, as well as wartime machines such as the Enigma and Hagelin, and ciphers used by spies.

Chinese Sexual Astrology Eastern Secrets to Mind-Blowing Sex

Whether a mind-blowing quickie or an orgasmic marathon, few things can equal the intense pleasure of love and sex. The heart-pounding thrill of romantic love is a universal human pursuit; we have all loved and lost and loved and won, but mostly we have just loved. Indeed, love is the universal language and the very essence of our being. Therefore, there comes a time when most of us are faced with the pivotal decision of choosing a partner. This is a decision that will affect our chance for relationship happiness and future sexual satisfaction.

A Short Course Canon S3

 

Short Courses is the leading publisher of digital photography books, textbooks, and guides to specific cameras from Canon, Sony, Nikon, Olympus and others.

Advanced Sexual Practices (Volume 2)

Advanced Sexual Practices level I (ASP I) deals with the more practical, mechanical aspects of lovemaking: thrusting techniques positions and their uses, mutual genital orgasms and so on.