Goodwin Procter LLP
Embedding and detecting hidden information
A novel method is disclosed for embedding hidden information in a document comprising characters, including: determining hidden information to be embedded in each class of layout transformation respectively; acquiring a code sequence for each class of layout transformation by coding the hidden information to be embedded in the class of layout transformation; performing layout transformation on characters from the document according to the acquired code sequence for each class of layout transformation respectively.
Beijing Sursen International Information Tech Co.
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Peng Yunming Yuansong Changwei De Donglin Shutian Ningsheng Yongzhi
Gao Zhang Liang Liu Ouyang Wang Yin Liu Lou