1. A method, comprising: storing a plurality of data documents; identifying a trusted computer network; monitoring a plurality of active network connections; determining that the trusted computer network is unavailable by determining that the plurality of active network connections does not comprise the trusted computer network; and in response to determining that the trusted computer network is unavailable, securing sensitive data documents, wherein securing the sensitive data documents comprises: for each data document of the plurality of data documents, determining a respective classification of a plurality of classifications, the plurality of classifications comprising a sensitive classification based on predetermined criteria; and encrypting particular data documents having the sensitive classification; determining that the trusted computer network is available by determining that the plurality of active network connections comprises the trusted computer network; and in response to determining that the trusted computer network is available, decrypting the particular data documents.