这本书包括了密码学和水印学竞争在内的各方面技术，这本书的内容覆盖知识范围广博，书中还有经过整理的代码，源代码等。-This book includes the study of cryptography and watermarking competition, including all aspects of technology, the content of this book cover a broad range of knowledge, the book also after finishing the code, source code and so on.