Due to actual equalization of qualified electronic signatures with handwritten signatures and the legal acknowledgment of the electronic form, the opportunity to use electronic patient records instead of classic paper-based ones is given. The archiving of medical records over a period of 10 to 30 years represents an important factor in medical documentation which has to be assured for electronically signed documents as well. The ArchiSig project deduces principles on long-term conservation of electronically signed documents and corresponding technical components to be realized by the means of multi professional analyses.