9783540426745. New condition. Hard cover. 3rd Revised and Updated ed. Language: English. Pages: 474. Sewn binding. Cloth over boards. 474 p. Contains: Illustrations. Cryptology for millennia a secret science is rapidly gaining in practical importance for the protection of communication channels databases and software. Beside its role in computerized information systems (public key systems) more and more applications within computer systems and networks are appearing which also extend to access rights and source file protection. The first part of this book treats secret codes and their uses - cryptography. The second part deals with the process of covertly decrypting a secret code - cryptanalysis - where in particular advice on assessing methods is given. The book presupposes only elementary mathematical knowledge. Spiced with a wealth of exciting amusing and sometimes personal stories from the history of cryptology it will also interest general readers. Decrypted Secrets has become a standard book on cryptology. This 3rd edition has again been revised and extended in many technical and biographical details.