Digital watermark for hand-written signatures or handwriting samples is generated from digital signals of additional, 4D detected writing specimen of same person, third party or other

摘要

The digital watermark is added to a detected and digitized signal produced from the signature and is generated from the digital signals of an additional, four-dimensional detected writing specimen of the same person, a third party or from another source such as a smart card, an encoded PI or passwords, and can be used for later validation of on-line signatures, hand-written passwords or PINs.