The challenge of Qualified Archiving

All employee related documents (contract, medical information, salary slips, etc.) need to digitally archived in a qualified way. You need to maintain these types of archives for a long period of time. You want to easily archive the information and its context (metadata, decision process, etc.). You do not know how to ensure that these archives will be still usable in 10, 20, 30 …50 years from now. You need to allow secured access to these archives punctually over time. You want to track copies from archive originals.