US 12,437,122 B2
Method and apparatus for producing recording medium and computer program
Kenta Imaida, Kobe (JP); Takuma Segawa, Kobe (JP); Eishin Hirokawa, Kobe (JP); Chien-Pao Lee, Kaohsiung (TW); and Hsiu-Hui Huang, Kaohsiung (TW)
Assigned to MICWARE CO., LTD., Kobe (JP); and ATP ELECTRONICS TAIWAN INC., Taipei (TW)
Filed by MICWARE CO., LTD., Kobe (JP); and ATP ELECTRONICS TAIWAN INC., Taipei (TW)
Filed on Sep. 22, 2023, as Appl. No. 18/371,759.
Application 18/371,759 is a continuation of application No. PCT/JP2022/013169, filed on Mar. 22, 2022.
Claims priority of application No. 2021-047471 (JP), filed on Mar. 22, 2021.
Prior Publication US 2024/0012949 A1, Jan. 11, 2024
Int. Cl. G06F 21/78 (2013.01); G06F 21/10 (2013.01); G06F 21/55 (2013.01); G06F 21/60 (2013.01)
CPC G06F 21/78 (2013.01) [G06F 21/10 (2013.01); G06F 21/554 (2013.01); G06F 21/602 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for producing a recording medium having a recording area in which content information indicating a content and security information for security for the content information are recorded,
in the recording area, medium specifying information for uniquely identifying the recording medium itself being recorded in advance, the medium specifying information having a predetermined number of bits,
the method comprising steps of:
(a) writing temporary security information and the content information in the recording area, the temporary security information including given information different from the medium specifying information, the given information having the same number of bits as the medium specifying information, and being to be replaced with the medium specifying information;
(b) reading the medium specifying information and the temporary security information from the recording area;
(c) replacing the given information in the temporary security information with the medium specifying information;
(d) encrypting the temporary security information in which the given information is replaced with the medium specifying information to generate the security information; and
(e) causing the security information generated in the step (d) to be recorded in the recording area.