From the world's most renowned security technologist, Bruce Schneier, this 20th Anniversary Edition is the most definitive reference on cryptography ever published and is the seminal work on cryptography. Cryptographic techniques have applications far beyond the obvious uses of encoding and decoding inmation. developers who need to know about capabilities, such as digital signatures, that depend on cryptographic techniques, there's no better overview than Applied Cryptography, the definitive book on the subject. Bruce Schneier covers general classes of cryptographic protocols and then specific techniques, detailing the inner workings of realworld cryptographic algorithms including the Data Encryption Standard and RSA publickey cryptosystems. The book includes sourcecode listings and extensive advice on the practical aspects of cryptography implementation, such as the importance of generating truly random numbers and of keeping keys secure.". . .the best introduction to cryptography I've ever seen. . . .The book the National Security Agency wanted never to be published. . . ." Wired Magazine". . .monumental . . . fascinating . . . comprehensive . . . the definitive work on cryptography computer programmers . . ." Dr. Dobb's Journal". . .easily ranks as one of the most authoritative in its field." PC MagazineThe book details how programmers and electronic communications professionals can use cryptographythe technique of enciphering and deciphering messagesto maintain the privacy of computer data. It describes dozens of cryptography algorithms, gives practical advice on how to implement them into cryptographic software, and shows how they can be used to solve security problems. The book shows programmers who design computer applications, networks, and storage systems how they can build security into their software and systems.With a new Introduction by the author, this premium edition will be a keepsake all those committed to computer and cyber security.