This project is part of the general context of a data dematerialisation process and aims to facilitate the automation of the various procedures of an electronic document management process, such as the verification of the content of digitised documents, the filing and archiving of these documents and the integration of documents into business applications of the company. To this end, it is necessary to develop techniques to analyse a document image and to enrich it semanticly in order to facilitate its exploitation. Another important objective of the project is to facilitate the transition from paper to digital documents by providing digital documents with the same level of reliability, authenticity and trust as paper documents. To achieve these objectives, the project is structured around three complementary research topics: 1/the analysis and semantic enrichment of images of documents, 2/Metaconnaissances and knowledge of the organisation of documents for their understanding, 3/Security of digitisation and storage of documents.