Method and device for archiving a document

The invention relates to a method for archiving a document, including: a step (225, 325, 425, 525) of encrypting the document with a symmetric key; a step (230, 330, 430, 530) of sending said encrypted document to an archiving operator; and a step of sending the symmetric key for encrypting said document to a receiving operator separate from the archiving operator. In certain embodiments, the method comprises a step (425, 525) of encrypting the symmetric key with a key consisting of a dual key comprising asymmetric keys. During the step of encrypting with the asymmetric key, the asymmetric key is that of the user having sent said document or that of the recipient of the document, depending on whether the method is used for personal archiving or for document transmission.