Preface to the Second Edition
It has been almost 7 years since the publication of
Digital Watermarking.
During this period there has been significant progress in digital watermark-
ing; and the field of steganography has witnessed increasing interest since the
terrorist events of September 11, 2001.
Digital watermarking and steganography are closely related. In the first edi-
tion of
Digital Watermarking we made a decision to distinguish between
watermarking and steganography and to focus exclusively on the former. For
this second edition we decided to broaden the coverage to include steganog-
raphy and to therefore change the title of the book to
Digital Watermarking
and Steganography.
Despite the new title, this is
not a new book, but a revision of the original.
We hope this is clear from the backcover material and apologize in advance to
any reader who thought otherwise.
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