Recording medium cartridge and a recording-and-reproducing apparatus thereof
View Patent ↗A recording-medium cartridge including a recording-medium and a cartridge memory. In this recording-medium cartridge, the cartridge memory holds a unique cryptographic key in the condition that the rewrite of the cryptographic key is forbidden, and is detachably attached to the recording-medium cartridge. The recording-medium holds a CRC-code, which is generated based on the cryptographic key and data to be recorded on the recording-medium, and data in the condition that the CRC-code is correlated with the data.
1. A recording-medium cartridge which stores a recording-medium and a cartridge memory, wherein
the cartridge memory which holds a unique cryptographic key in the condition that the rewrite of the cryptographic key is forbidden is detachably attached to the recording-medium cartridge, and wherein
the recording-medium holds a CRC-code, which is generated based on the cryptographic key and data to be recorded on the recording-medium, in the condition that the CRC-code is correlated with the data.
2. A recording-medium cartridge according to claim 1 , wherein
the CRC-code and data are recorded on the recording-medium in the condition that the CRC-code and data adjoin with each other.
3. A recording-medium cartridge according to claim 2 , wherein
the recording-medium cartridge is a magnetic tape.
4. A recording-medium cartridge according to claim 2 , wherein
the recording-medium cartridge is a magnetic disk.
5. A recording-medium cartridge according to claim 1 , wherein
the recording-medium cartridge is a magnetic tape.
6. A recording-medium cartridge according to claim 1 , wherein
the recording-medium cartridge is a magnetic disk.
7. A recording-medium cartridge according to claim 1 , wherein
the recording-medium cartridge is an optical recording tape.
8. A recording-medium cartridge according to claim 1 , wherein
the recording-medium cartridge is an optical recording disk.
9. A recording-and-reproducing apparatus which performs a recording-and-reproducing of data on a recording medium housed within a recording-medium cartridge, the recording-and-reproducing apparatus comprising:
a CRC-code generator, which generates a CRC-code based on a cryptographic key, which is obtained from a cartridge memory detachably stored in the recording-medium cartridge, and data entered from an external device, when performing a recording of the data on the recording-medium, and
the CRC-code generator generates a reference CRC-code based on a cryptographic key, which is obtained from the cartridge memory, and data obtained from the recording-medium, when performing a reproducing of the data recorded on the recording-medium;
a CRC-code recorder which records the CRC-code on the-recording-medium when performing the recording of the data on the recording medium;
a CRC-code comparator which compares the reference CRC-code generated by the CRC-code generator with the CRC-code obtained from the recording-medium, when performing the reproducing; and
a reproducing controller which determines whether or not to allow the reproducing of data recorded on the recording-medium based on the comparison result of the CRC-code comparator.
10. The recording-and-reproducing apparatus according to claim 9 , wherein
the recording-and-reproducing apparatus has a unique identification number, and wherein
the CRC-code generator generates the CRC-code based on the cryptographic key, the unique identification number, and data entered from an external device, when performing a recording, and
the CRC-code generator generates the reference CRC-code based on the cryptographic key, the unique identification number, and data obtained from the recording-medium, when performing a reproducing.
11. The recording-medium cartridge according to claim 10 , wherein the recording-medium cartridge is a magnetic tape.
12. The recording-medium cartridge according to claim 10 , wherein the recording-medium cartridge is a magnetic disk.
13. The recording-and-reproducing apparatus, according to claim 9 ,
wherein the CRC-code and data are recorded on the recording-medium in the condition that the CRC-code and data adjoin with each other.
14. The recording-medium cartridge according to claim 13 , wherein the recording-medium cartridge is a magnetic tape.
15. The recording-and-reproducing apparatus according to claim 13 , wherein
the recording-and-reproducing apparatus has a unique identification number, and wherein
the CRC-code generator generates the CRC-code based on the cryptographic key, the unique identification number, and data entered from an external device, when performing a recording, and
the CRC-code generator generates the reference CRC-code based on the cryptographic key, the unique identification number, and data obtained from the recording-medium, when performing a reproducing.
16. The recording-medium cartridge according to claim 15 , wherein the recording-medium cartridge is a magnetic tape.
17. The recording-medium cartridge according to claim 9 , wherein the recording-medium cartridge is a magnetic tape.
18. The recording-medium cartridge according to claim 9 , wherein the recording-medium cartridge is an optical recording tape.
19. The recording-medium cartridge according to claim 9 , wherein the recording-medium cartridge is a magnetic disk.
20. The recording-medium cartridge according to claim 9 , wherein the recording-medium cartridge is an optical recording disk.
21. A recording-medium cartridge which utilizes electromagnetic induction to exchange data with an external device in a contactless manner, the recording medium cartridge comprising:
a cartridge memory which contains a unique cryptographic key where a rewrite of the cryptographic key is forbidden and the cartridge memory is detachably attached to the recording-medium cartridge;
a recording-medium which holds a cyclic redundancy check (CRC) code where the CRC code is generated with the cryptographic key and data to be recorded on the recording-medium,
wherein the CRC-code is correlated with the data to be recorded.
22. An apparatus for recording and reproducing data with a recording medium cartridge, the apparatus comprising:
a cyclic redundancy check (CRC) code generator which generates a first CRC code based on a cryptographic key obtained from a cartridge memory of the recording-medium cartridge and data entered from an external device when recording data on the recording medium of the recording medium cartridge, and generates a reference CRC code based on a cryptographic key obtained from the cartridge memory of the recording medium and data obtained from the recording-medium of the recording medium cartridge when reproducing data recorded on the recording medium of the recording medium cartridge;
a CRC code recorder which records the first CRC code on the recording medium of the recording medium cartridge when recording;
a CRC code comparator which compares the reference CRC code with the first CRC code obtained from the recording-medium of the recording medium cartridge, when reproducing the data recorded on the recording medium of the recording medium cartridge; and
a reproducing controller which determines whether the reproducing of the data recorded on the recording-medium is allowed based on a comparison result of the CRC-code comparator.