1. A method of transmitting DRM content, stored in a device, to another external device, comprising:
embedding a rights object in a mutable information box of a Digital rights management Content Format (DCF), thus integrating the rights object and the DCF into a single object, and transmitting the DCF, in which the rights object is embedded, with a message authentication code being embedded in the mutable information box of the DCF so as to enable integrity validation for the DCF, in which the rights object is embedded;
wherein the rights object is a domain rights object capable of being shared by one or more devices.
2. The method of transmitting DRM content as set forth in claim 1, wherein the message authentication code is constructed using a Hash-based Message Authentication Code (HMAC)-Secure Hash Algorithm 1 (SHA1), and a master key for the message authentication code is created using a specific security algorithm.
3. The method of transmitting DRM content as set forth in claim 1, wherein the transmitting the DCF, in which the rights object is embedded, to the external device is performed via mobile storage, in which no security function exists or no security function is set.
4. The method of transmitting DRM content as set forth in claim 3, wherein the transmitting the DCF, in which the rights object is embedded, via mobile storage comprises:
creating a device authentication code for identifying a target device; and
transmitting the device authentication code, together with the DCF.
5. The method of transmitting DRM content as set forth in claim 4, wherein a secret key, used when the device authentication code is created, is reprocessed through a specific security algorithm and is then used as a master key for the message authentication code.
6. The method of transmitting DRM content as set forth in claim 4, wherein the target device is an unconnected device.
7. The method of transmitting DRM content as set forth in claim 6, wherein the target device is car audio equipment, including at least a Universal Serial Bus (USB) port or a memory card slot.
8. The method of transmitting DRM content as set forth in claim 1, wherein the transmitting the DCF, in which the rights object is embedded, to the external device comprises transmitting a playlist file for the DRM content, together with the DCF.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An image forming apparatus, comprising:
a plurality of image carriers;
toner image forming means for forming toner images on the plurality of image carriers respectively;
primary transfer means for transferring successively the toner images formed on the plurality of image carriers onto an intermediate transfer member whose surface moves;
secondary transfer means for transferring to a recording medium the toner images on the intermediate transfer member, on a surface of which the images are moved, in one operation; and
intermediate transfer member cleaning means, which is in contact with the intermediate transfer member, for cleaning secondary transfer residual toner, and,
wherein the plurality of image carriers is in a form of a plurality of image carrier units that can each be removed from or inserted into a main body of the image forming apparatus, and
the intermediate transfer member cleaning means is disposed upstream, relative to the direction of movement of the surface of the intermediate transfer member, of the image carrier unit that is disposed uppermost in the upstream direction, and the intermediate transfer member cleaning means being capable of being integrally removed from the main body of the image forming apparatus.
2. The image forming apparatus as claimed in claim 1, wherein the intermediate transfer member cleaning means is an elastic blade.
3. The image forming apparatus as claimed in claim 1, wherein the intermediate transfer member cleaning means is a fiber member.
4. The image forming apparatus as claimed in claim 3, wherein the fiber member is provided on the image carrier unit with an elastic member disposed therebetween.
5. The image forming apparatus as claimed in claim 1, wherein the intermediate transfer member cleaning means is removable with respect to the image carrier unit.
6. The image forming apparatus as claimed in claim 1, wherein when mounting the image carrier unit on the main body, the intermediate transfer member is separated from the image carrier of the image carrier unit.
7. The image forming apparatus as claimed in claim 1, wherein the intermediate transfer member is in a form of a belt, and a cleaning opposing roller is disposed opposite to the intermediate transfer member cleaning means on a reverse side of the intermediate transfer member.
8. The image forming apparatus as claimed in claim 1, wherein second intermediate transfer member cleaning means for cleaning the intermediate transfer member is disposed upstream of the intermediate transfer member cleaning means relative to the direction of movement of the surface of the intermediate transfer member.
9. The image forming apparatus as claimed in claim 8, wherein the intermediate transfer member cleaning means is a fiber member, and the second intermediate transfer member cleaning means is an elastic blade.
10. An image forming apparatus comprising;
a plurality of image forming carriers;
toner image forming means configured to form toner images on the plurality of image carriers respectively;
primary transfer means configured to transfer successively the toner images formed on the plurality of image carriers onto an intermediate transfer member whose surface moves;
secondary transfer means configured to transfer to a recording medium the toner images on the intermediate transfer member, on a surface of which the images are moved, in one operation; and
intermediate transfer member cleaning means, which is in contact with the intermediate transfer member, and is configured to clean secondary transfer residual toner, and,
wherein the plurality of image carriers is in a form of a plurality of image carrier units that can each be removed from or inserted into a main body of the image forming apparatus, and
the intermediate transfer member cleaning means is disposed upstream, relative to the direction of movement of the surface of the intermediate transfer member, of the image carrier unit that
is disposed uppermost in the upstream direction, and the intermediate transfer member cleaning means being capable of being integrally removed from the main body of the image forming apparatus