In a method for managing transmission of data files to users, a first file is divided into first segments and a second file is divided into second segments. A first segment is sent to a first user and a different first segment is sent to a second user. A second segment is sent to the first user and a different second segment is sent to the second user. At least part of a segment sent to the first user is combined with at least part of a segment sent to the second user to produce a combined segment which is of smaller size than the total size of the at least parts of segments before combining. The combined segment is transmitted to the first user and to the second user for each user to recover a segment using the combined segment and at least part of a segment.