1 : A system comprising: one or more processors; and one or more non-transitory computer-readable media including instructions that, when executed by the one or more processors, cause an image processing device to perform operations comprising: initiating, at the image processing device, a scan operation to generate an electronic document representing a scanned physical document; encrypting the electronic document; storing the encrypted electronic document; and outputting a message that includes location information, a key, and restriction information, the location information for locating the encrypted electronic document, the key for decrypting the encrypted electronic document, the restriction information indicating a restriction associated with the encrypted electronic document, wherein the restriction information includes one or more instructions which when executed on a computing device cause the computing device to restrict availability of at least one function or feature of the computing device in accordance with the restriction information in order to restrict, at the computing device, use of one or both of the encrypted electronic document and an unencrypted electronic document generated by decrypting the encrypted electronic document using the key.