1. A method for document management comprising: automatically acquiring image logs for all input documents being processed by image output devices within an organization, each image log comprising image data and an associated record for an input document being processed by one of at least one image output device within the organization, whereby image data is automatically acquired for all documents being processed by the organization's image output devices, without provision for a user to select whether a document image should be logged; automatically sending all of the image logs from the image output devices to an image log management system and storing the image logs in memory until a search for similar documents is performed; for each of the acquired and stored image logs, performing the search for similar documents and automatically retrieving similar documents, including identifying keywords extracted from the acquired image data, and based on the keywords, performing a search among previously acquired documents archived in a computer readable storage medium and accessible electronic documents stored in at least one other document repository to retrieve similar documents; and where a similar document is retrieved, computing a measure of similarity between the retrieved similar document and the input document; and based on the computed similarity, determining whether the retrieved document is a matching document and, if so, storing a location of the retrieved matching document whereby for the input document, a location of each retrieved matching document is stored; and providing a procedure for ensuring that a single version of the input document is archived in the computer-readable storage medium, the version being selected from the captured image data and any identified matching documents, except optionally where the job log indicates that at least one of the retrieved matching document locations is a public document source; the method further comprising: where the retrieved document has access controls, including a reference to the access controls of the retrieved document in the stored job log and further including at least one of: a) storing user information from the record of the image log in the stored job log, whereby a leak of an access controlled document is attributable to the user which caused the input document to be processed by the image output device; and b) blocking processing of the input document by the image output device where the access controls of the retrieved matching document indicate that such processing should be blocked.