Computing document managing device for e.g. digital work producing chain, has time stamp module called with references of prints to provide unified reference, where correspondence between signature value and unified reference is stored

摘要

The device has an extractor to decompose document content into elements. A signature generator returns signatures of the content. A print generation module (110) is arranged to operate a print generation function on the content to provide prints with signatures, where the function associates a temporality reference and signatures. A time stamp module is repeatedly called with a list of temporality references of prints containing same signature value to provide unified temporality reference for each signature value, where correspondence between each value and the unified reference is stored.