摘要:
A method and apparatus for restricting the use of a disc are provided. In this method, first, lead-in data is read out from a loaded disc. Then, a user key is read out from a lead-in area of the disc. Thereafter, the user key undergoes authentication based on a user key received from a host. The authentication is performed by comparing a random number produced by a disc drive with a decrypted random number obtained by the disc drive decrypting a random number encrypted by the host. Accordingly, the use of the disc by an unauthorized third person is restricted, thus preventing a leakage of personal information and a protection of the copyrights of data.
摘要:
A method of and an apparatus for copying and decrypting encrypted digital data. The method of copying encrypted digital data includes encrypting a first media key block to be used for decryption of the encrypted digital data using a predetermined key of a second information storage medium and storing the encrypted digital data and the encrypted first media key block in the second information storage medium. Security of data encryption is heightened by not discarding an encryption key used for an initial encryption, encrypting the encryption key used for initial encryption using another encryption key used for a second encryption, and storing the encrypted encryption key with the data. Also, since unnecessary decryption and encryption of data are not repeated, the time required for copying data is reduced, and since data is transferred between apparatuses in an encrypted state, a security level is higher.
摘要:
A method and apparatus for recording data on and/or reproducing data from a storage medium are provided. The recording apparatus includes an authenticating unit which authenticates a host, which transmits a write command to the apparatus, to verify whether the host is authentic; at least one job module which generates output information by processing the user data, which is included in the write command, based on disc information stored in the storage medium and device information stored in the apparatus, in response to the write command; a module selecting unit which selects the job module based on module selection information and sends the write command to the selected job module, when the host is determined to be authentic, the module selection information being contained in the write command and specifying the job module; and a recording unit which records the output information on the storage medium.
摘要:
Provided are a method of recording/reproducing data under control of a domain management system. The method includes extracting, from the write command, domain management information regarding the predetermined domain and contents, and copy control information specifying an extent of copying the contents within the predetermined domain; recording the extracted domain management information on the storage medium; generating a domain-bound flag that is used to determine whether the recording apparatus which records the contents on a storage medium is present in the predetermined domain, based on the extracted copy control information; and recording the domain-bound flag and the contents on the storage medium. Accordingly, it is possible to record contents, recording of which is limited within a predetermined domain, on a storage medium outside a slave under control of a domain management system, while preventing the contents from being reproduced within other domains.
摘要:
Provided are an information storage medium from which a total number of times that data can be reproduced is limited, a method and apparatus for recording data on the information storage medium, and a method and apparatus for reproducing data from the information storage medium. The information storage medium includes a data zone storing user data, and a control information zone storing control information regarding controlling a number of times that the user data can be reproduced. Accordingly, a content provider who provides content such as a movie can create various types of business models by recording content on the aforementioned information storage medium, and selling it at a cheaper price. Further, control information is recorded on the information storage medium or a write once zone of the information storage medium before recording content or user data thereon, thereby preventing the control information from being changed or deleted.
摘要:
An audio and/or video (AV) stream copy method, an AV stream copy apparatus, and an AV contents copy control method, in which AV content includes an AV stream, are disclosed. The apparatus for copying an AV stream includes an AV stream copy controller, which, when an input copy command does not correspond to copy control information (CCI) of the AV stream, gives instructions to input a CCI coupon including new CCI, extracts the new CCI from the input CCI coupon, and gives instructions to copy the AV stream; a CCI coupon input unit, which inputs the CCI coupon according to a CCI coupon input command of the AV stream copy controller; and an AV stream copy unit, which changes the CCI of the AV stream, according to an AV stream copy command of the AV stream copy controller, and the extracted CCI and copies the AV stream.
摘要:
An apparatus and method for updating copy control information. The apparatus and method can update copy control information of input data with user-defined copy control information. The apparatus includes a copy control information detection unit, which detects copy control information from input data; a copy control information input unit, which receives user-defined copy control information from a user; and a copy control information update unit, which updates the copy control information of the input data with the user-defined copy control information. The copy control information update unit may update the copy control information of the input data with the user-defined copy control information only when the user-defined copy control information imposes a stricter restriction on copying the input data than the copy control information of the input data does.
摘要:
A method of assigning user keys for broadcast encryption. According to the method, at least one unit tree in which grandparent nodes, parent nodes, and son nodes are hierarchically connected is created. User keys created to identify lower-level nodes connected to all nodes of the tree are assigned as first user keys of the nodes for all nodes of the tree, and node identification user keys of the son nodes except for the son node included in the unit tree among node identification user keys that identifies son nodes included in unit trees are assigned as second user keys of the son nodes.
摘要:
Provided is a method of copying data stored in a first storage medium to a second storage medium. The method includes recording the encrypted data stored in the first storage medium on the second storage medium; reproducing a first content key, which is used to encrypt the encrypted data, using a first drive into which the first storage medium is loaded; encrypting the first content key; sending the encrypted first content key to a second drive into which the second storage medium is loaded; and recording the encrypted first content key on the second storage medium. In this method, encrypted data stored in a first storage medium is sent to a second storage medium via a host without decrypting the encrypted data, thereby preventing the data from being hacked or being accessed by unauthorized users and increasing a speed of copying the encrypted data.
摘要:
A method and apparatus for restricting the use of a disc are provided. In this method, first, lead-in data is read out from a loaded disc. Then, a user key is read out from a lead-in area of the disc. Thereafter, the user key undergoes authentication based on a user key received from a host. The authentication is performed by comparing a random number produced by a disc drive with a decrypted random number obtained by the disc drive decrypting a random number encrypted by the host. Accordingly, the use of the disc by an unauthorized third person is restricted, thus preventing a leakage of personal information and a protection of the copyrights of data.