Time Identification of Electronic Documents

How to identify documents and files' real formation time (documents writing time) and revision etc. is an important work to maintain the original history appearance and play its proof role in judicial practice, history study, literature study, files managements, e-commerce and e-government affairs development, which is very important. By studying the domestic and foreign literature, from the current research situation that only solved the problems of creation time, latest modification time and latest access time. For the problems of how to make sure the files time when its had been changed, copied, deleted, recovered for many times, how to make sure it's creation time and upload time on the web front platform before entering the server, how to make sure the files creation time when the system time is not right as well as how to set and implement the time sign management standards during the files creation process etc., which need further research. Many technical methods of electronic document's time identification is given in the paper.