Abstract: Disclosed herein is an information recording apparatus including: a loading section configured to be loaded with a recording medium for managing a file on the basis of at least one of an FAT file system and a file system similar thereto; and a control section configured, in updating at least one directory entry recorded to an area in a second and subsequent clusters in a recording area of directory entries in a predetermined directory in the recording medium, to read data, update at least the one directory entry, record the updated data, and update the FAT of the recording medium and management information similar to the FAT such that the area in which the updated data of the area in the second and subsequent clusters is recorded is linked to the area in a first cluster of the recording area in the predetermined directory.

Abstract: Disclosed herein is a recording apparatus including: an input section configured to input main data and added data attached to the main data; and a recording control section configured such that when the main data and the added data input through the input section have each reached a predetermined data amount, the recording control section temporarily stores the main data and the added data in units of the predetermined data amount; and that when the sum of the amounts of the temporarily stored data has reached a specific data amount, the recording control section transfers the temporarily stored data to recording media for recording thereto in a single file; the recording control section further registering management data about the recorded data to a file system of the recording media in such a manner that the management data is sorted by the data type of the recorded data.

Abstract: An information recording apparatus with a capability of recording information to a plurality of non-contact recording media within a communicable range of the apparatus body, the apparatus including: a medium loading portion into which a non-contact recording medium is removably loaded; a medium detector configured to detect that a non-contact recording medium has been loaded in the medium loading portion; a first antenna for sending and receiving information to and from the non-contact recording medium loaded in the medium loading portion; a second antenna for sending and receiving information to and from the non-contact recording medium removed from the medium loading portion; and antenna switch for switching between the first antenna and the second antenna according to the detection output from the medium detector.

Abstract: A method of transmitting and receiving data in which cipher-transmission of digital information data for which forbidden codes including timing identification codes are predetermined can be carried out with enciphered digital information data without containing undesirable forbidden code. Digital information data contained in word sequence data which also contain time reference code data composed of the timing identification codes are subjected to enciphering process without producing the forbidden code to produce the enciphered digital information data which do not contain any forbidden code. Enciphered word sequence data are constituted with the enciphered digital information data and the time reference code data to be transmitted.

Abstract: A recording-and-reproducing apparatus for managing content data recorded on a removable recording medium includes: a device configured to acquire reproduction information required for reproducing the content data; a device configured to generate a first management file for individually managing the content data; a device configured to register control information for the content data in a second management file collectively managing the content data. Further, the apparatus includes a device configured to read out the control information in the second management file recorded on the recording medium; a memory in which the control information of the second management file read out by the read-out device is expanded; a device configured to compare the control information in the second management file expanded in the memory and the content data recorded on the recording medium; and a device configured to update the control information in the second management file expanded in the memory.

Abstract: A recording medium in which data supplied from an information processing device is recorded includes: position detecting means for detecting a position of the recording medium; user authentication means for authenticating a user intending to use the data; recording means for recording data use limitation information; and data use limitation control means for controlling the limitation on the user's use of data on the basis of the data use limitation information.

Abstract: A recording-and-reproducing apparatus for managing content data recorded on a removable recording medium includes: a device configured to acquire reproduction information required for reproducing the content data; a device configured to generate a first management file for individually managing the content data; a device configured to register control information for the content data in a second management file collectively managing the content data. Further, the apparatus includes a device configured to read out the control information in the second management file recorded on the recording medium; a memory in which the control information of the second management file read out by the read-out device is expanded; a device configured to compare the control information in the second management file expanded in the memory and the content data recorded on the recording medium; and a device configured to update the control information in the second management file expanded in the memory.

Abstract: Video data exploitation by alteration of data is prevented. An extractor 111 extracts valid video data in data 110 and predetermined data in the data. An inserter 114 inserts an arithmetic operation result of the predetermined data by an arithmetic operation unit 113 into the valid video data encrypted by an encryptor 112. An output of the inserter 114 is supplied to an extractor 144 through a transmission path 120. The encrypted valid video data and arithmetic operation resultant data of the arithmetic operation unit 113 are extracted. An arithmetic operation unit 143 executes the same arithmetic operation as that of the arithmetic operation unit 113 to data corresponding to the data used in the arithmetic operation unit 113 from the valid video data decrypted by a decryptor 141 and extracted by an extractor 144. A comparator 145 compares an output of the arithmetic operation unit 143 with an arithmetic operation result extracted from data 140.

Abstract: A method of transmitting data by which cipher-transmission of digital information data for which forbidden codes including timing identification codes are predetermined can be carried out with enciphered digital information data without containing undesirable forbidden code, in which digital information data contained in word sequence data which contain also time reference code data composed of the timing identification codes are subjected to enciphering process without producing the forbidden code to produce the enciphered digital information data which do not contain any forbidden code and then enciphered word sequence data are constituted with the enciphered digital information data and the time reference code data to be transmitted.

Abstract: An apparatus for enciphering data by which enciphered digital information data with improved cipher strength are obtained by subjecting digital information data to enciphered process responding to random number data or pseudo-random number data produced in accordance with key data, and which comprises an enciphering portion for subjecting an HD signal to enciphering process to produce an enciphered HD signal, a cipher producing portion for producing, in response to key data, a cipher data from which random number data or pseudo-random number data are obtained to be supplied to the enciphering portion, a register for supplying the cipher producing portion with input data, and a line number data extracting portion for extracting line number data from the HD signal to be supplied to the register as initial data.

Abstract: An encryption apparatus for encrypting input picture data with high secrecy and restoration against an error of encrypted data. An EXOR circuit calculates input picture data and a pseudo random sequence and obtains encrypted data. The obtained encrypted data are held in a first FF circuit. The first FF circuit is reset for each line. Counters count for each line or each frame and are reset for each frame or at the beginning of a program. An encryption device encrypts outputs of a second FF circuit that holds a fixed value, the counters and the first FF circuit with a key and generates a pseudo random sequence. A shift register divides the bit sequence. The EXOR circuit calculates the output of the shift register and the input picture data and obtains encrypted data. Since the encrypted output is fed back, data cannot be stolen using a successive input of the same data. In addition, since an encrypted output that is fed back is reset for each line, the encrypted output can be recovered from an error.

Abstract: Video data exploitation by alteration of data is prevented. An extractor 111 extracts valid video data in data 110 and predetermined data in the data. An inserter 114 inserts an arithmetic operation result of the predetermined data by an arithmetic operation unit 113 into the valid video data encrypted by an encryptor 112. An output of the inserter 114 is supplied to an extractor 144 through a transmission path 120. The encrypted valid video data and arithmetic operation resultant data of the arithmetic operation unit 113 are extracted. An arithmetic operation unit 143 executes the same arithmetic operation as that of the arithmetic operation unit 113 to data corresponding to the data used in the arithmetic operation unit 113 from the valid video data decrypted by a decryptor 141 and extracted by an extractor 144. A comparator 145 compares an output of the arithmetic operation unit 143 with an arithmetic operation result extracted from data 140.

Abstract: A recording medium in which data supplied from an information processing device is recorded includes: position detecting means for detecting a position of the recording medium; user authentication means for authenticating a user intending to use the data; recording means for recording data use limitation information; and data use limitation control means for controlling the limitation on the user's use of data on the basis of the data use limitation information.

Abstract: An apparatus for enciphering digital information data with improved cipher strength by subjecting digital information data to enciphered process responding to random number data or pseudo-random number data produced in accordance with key data. The apparatus comprises an enciphering portion for producing the enciphered digital information data, a cipher producing portion for producing, in response to the key data, a cipher data from which random number data or pseudo-random number data are obtained to be supplied to the enciphering portion, a register for supplying the cipher producing portion with input data, and an initial value data generator for supplying the register with enciphered initial value data.

Abstract: A recording-and-reproducing apparatus for managing content data recorded on a removable recording medium includes: a device configured to acquire reproduction information required for reproducing the content data; a device configured to generate a first management file for individually managing the content data; a device configured to register control information for the content data in a second management file collectively managing the content data. Further, the apparatus includes a device configured to read out the control information in the second management file recorded on the recording medium; a memory in which the control information of the second management file read out by the read-out device is expanded; a device configured to compare the control information in the second management file expanded in the memory and the content data recorded on the recording medium; and a device configured to update the control information in the second management file expanded in the memory.

Abstract: An apparatus for holding a recording medium that contains an engagement member backwards with respect to an insert direction thereof has a main body containing an insert portion through which the recording medium is inserted on one end thereof and an eject portion on the other end thereof. The inserted recording medium are ejected from the eject portion with it being linked with an insert of the recording medium from the insert portion. The apparatus has a first engagement device that engages the engagement member of the recording medium when the recording medium is inserted by a predetermined position to hold the inserted recording medium. The apparatus has a second engagement device that engages the engagement member of the recording medium when the recording medium is ejected from the ejection portion to hold the ejected recording medium.

Abstract: A switch has a detection portion that contains a magnetic-field-sensing element and an attraction member. The attraction member generates a magnetically attracting force. The detection portion generates a switching signal based on an output of the magnetic-field-sensing element.

Abstract: Video data exploitation by alteration of data is prevented. An extractor 111 extracts valid video data in data 110 and predetermined data in the data. An inserter 114 inserts an arithmetic operation result of the predetermined data by an arithmetic operation unit 113 into the valid video data encrypted by an encryptor 112. An output of the inserter 114 is supplied to an extractor 144 through a transmission path 120. The encrypted valid video data and arithmetic operation resultant data of the arithmetic operation unit 113 are extracted. An arithmetic operation unit 143 executes the same arithmetic operation as that of the arithmetic operation unit 113 to data corresponding to the data used in the arithmetic operation unit 113 from the valid video data decrypted by a decryptor 141 and extracted by an extractor 144. A comparator 145 compares an output of the arithmetic operation unit 143 with an arithmetic operation result extracted from data 140.

Abstract: An information recording apparatus with a capability of recording information to a plurality of non-contact recording media within a communicable range of the apparatus body, the apparatus including: a medium loading portion into which a non-contact recording medium is removably loaded; a medium detector configured to detect that a non-contact recording medium has been loaded in the medium loading portion; a first antenna for sending and receiving information to and from the non-contact recording medium loaded in the medium loading portion; a second antenna for sending and receiving information to and from the non-contact recording medium removed from the medium loading portion; and antenna switch for switching between the first antenna and the second antenna according to the detection output from the medium detector.

Abstract: Encrypted auxiliary information data DYAE/DCAE including no inhibited codes is generated based on auxiliary information data DYA/DCA including no inhibited codes, in an auxiliary data packet having an auxiliary data flag ADF formed of a first combination of a plurality of inhibited codes, the auxiliary data flag ADF is replaced with an auxiliary data flag EADF formed of a second combination of the inhibited codes, the second combination being different from the first combination, to form an encrypted auxiliary data packet having the auxiliary data flag EADF and including the encrypted auxiliary information data DYAE/DCAE, and the encrypted auxiliary data packet is transmitted.