Information hiding with a handwritten message in vector-drawing codes

The Internet has been evolving exponentially, and various types of communication systems for computer supported cooperative work (CSCW) are available throughout networks. Some of those systems provide handwriting functions, and handwritten messages are often used for authentication. In other communication systems, however, one needs information hiding. A requirement of a communication system is to provide a subliminal channel for secret communications. This paper presents new algorithms for information hiding with a handwritten message which is encoded with vector drawing.