A rights management arrangement for storage media such as optical digital video disks (DVDs, also called digital versatile disks) provides adequate copy protection in a limited, inexpensive mass-produceable, low-capability platform such as a dedicated home consumer disk player and also provides enhanced, more flexible security techniques and methods when the same media are used with platforms having higher security capabilities. A control object (or set) defines plural rights management rules for instance, price for performance or rules governing redistribution. Low capability platforms may enable only a subset of the control rules such as controls on copying or marking of played material. Higher capability platforms may enable all (or different subsets) of the rules. Cryptographically strong security is provided by encrypting at least some of the information carried by the media and enabling decryption based on the control set and/or other limitations. A secure “software container” can be used to protectively encapsulate (e.g., by cryptographic techniques) various digital property content (e.g., audio, video, game, etc.) and control object (i.e., set of rules) information. A standardized container format is provided for general use on/with various mediums and platforms. In addition, a special purpose container may be provided for DVD medium and appliances (e.g., recorders, players, etc.) that contains DVD program content (digital property) and DVD medium specific rules. The techniques, systems and methods disclosed herein are capable of achieving compatibility with other protection standards, such as for example, CGMA and Matsushita data protection standards adopted for DVDs. Cooperative rights management may also be provided, where plural networked rights management arrangements collectively control a rights management event on one or more of such arrangements.

Cryptographic methods, apparatus and systems for storage media electronic rights management in closed and connected appliances

Systems and methods for secure messaging are provided. A sender may encrypt content and send the encrypted content to a recipient over a communications network. The encrypted content may be decrypted for the recipient using a remote decryption service. Encrypted message content may be placed into a markup language form. Encrypted content may be incorporated into the form as a hidden form element. Form elements for collecting recipient credential information such as username and password information may also be incorporated into the form. At the recipient, the recipient may use the form to provide recipient credential information to the remote decryption service. The recipient may also use the form to upload the encrypted content from the form to the decryption service. The decryption service may provide the recipient with access to a decrypted version of the uploaded content over the communications network.

Secure message system with remote decryption service

A semiconductor memory device comprises memory cells, a bitline connected to the memory cells, a read circuit including a precharge circuit, and a first transistor connected between the bitline and the read circuit, wherein a first voltage is applied to a gate of the first transistor when the precharge circuit precharges the bitline, and a second voltage which is different from the first voltage is applied to the gate of the first transistor when the read circuit senses a change in a voltage of the bitline.

Semiconductor memory device.

The present invention provides an apparatus for securely acquire a circuit configuration information set corresponding to a new cryptosystem without increasing the number of reconfigurable circuits. A content playback apparatus 100 includes an FPGA 122 that is reconfigurable. The content playback apparatus 100 stores a decryption circuit program that shows the structure of a decryption circuit that executes decryption in accordance with a prescribed cryptosystem. The FPGA is reconfigured in accordance with the program to configure the decryption circuit. The playback apparatus 100 acquires, from outside, an encrypted file that has been generated by encrypting a file including a decryption circuit program corresponding to the new cryptosystem in accordance with the prescribed cryptosystem, and decrypts the encrypted file by the decryption circuit.

Information security device

An electrostatic chuck device provided with a dielectric plate with a surface embossed to give it a plurality of projections, an electrode, and an external power source, wherein substrate supporting surfaces of the plurality of projections are covered by conductor wiring and the conductor wiring electrically connects the substrate supporting surfaces of the plurality of projections At the time of substrate processing, when the embossed projections contact the back of the substrate, the back of the substrate and the conductor wiring is made the same in potential due to the migration of the charges, the generation of force between the back of the substrate and the conductor wiring being in contact with the same is prevented, and a rubbing state between the two is prevented Due to this, the electrostatic chuck device reduces the generation of particles, easily and stably removes and conveys substrates, and realizes a high yield and system operating rate

Electrostatic chuck device

PURPOSE: To allow a center to conduct cipher communication with a terminal equipment and verification of the terminal equipment without having a cipher information list by writing an ID of a terminal equipment and cipher information in advance to the terminal equipment and to cipher data again and to obtain the cipher information at communication and to allow the center and the terminal equipment to use the cipher information in common. CONSTITUTION: A center 300 keeps ciphering information Kc . The center 300 calculates terminal equipment cipher information Si = Encipher (Kc .IDi ) based on the IDi of the terminal equipment to initialize the terminal equipment 360. The center 300 writes the IDi and the Si to the terminal equipment 360. At the start of cipher communication, an ID information storage device 391 of the terminal equipment 360 at first sends the IDi to a network interface(IF) 380, the IF 380 sends the IDi to a center 300 through a network 350. A terminal cipher information holding equipment sends information Si to a key storage device 393. The center 300 receives the IDi and gives it to a converter 320. The converter 320 receiving information Kc from a storage device 321 calculates the information Si and stores it to a storage device 322. Thus, the center 300 and the terminal equipment 360 use the information Si in common to allow the center 300 and the terminal equipment 360 to conduct cipher communication.

Cipher key management equipment

PURPOSE:To provide a ciphering device and a deciphering device which prevent a cipher key from easily being estimated even when a 3rd party knows both a plaintext and a ciphertext by inserting random bits into the plaintext by a cipher system. CONSTITUTION:The ciphering preprocessor which preprocesses the input of the ciphering device has an input means 11 which inputs an array of plaintexts to be ciphered, a block dividing means 12 which sections the inputted plaintext array by predetermined length into blocks, and a random number generating means 13 which repeatedly generate the random bits. Further, the processor has an inserting means 14 which inserts the random bits generated by the random number generating means 13 at predetermined positions of the respective blocks generated by the block dividing means 12 and an output means 15 which passes the blocks, having the random bits inserted by the inserting means 14, to the ciphering device in order.

Ciphering preprocessor and deciphering postprocessor by cipher

PURPOSE:To eliminate special operation when individual keys are lost, etc., by storing the individual keys as key information with files. CONSTITUTION:The identification information of the file 11 having data M is inputted to a file identification information input part 101 and the data M is read by a file reading part 105. The read data is enciphered to a cryptogram (c) by a shared cryptographic key of a ciphering part 106 using an individual key (k) inputted by an individual key 102 and made (c)=Ek(M). Ek(M) means that M is enciphered by the key (k) using a supplying cryptographic key. At the same time, the individual key (k) is converted into key information 1k by an open key (e) inputted by an open key input part 103 using a key information generation part 104 and made 1k=E(e, k). E(e, k) means that the (k) is enciphered by the open key (e) using the open cryptographic key. Then, the key information 1k is added to the cryptogram (c) using an individual key information adding part 107 and a cryptographic file 12 is generated.

Ciphering and deciphering device for data security protection device

PURPOSE: To confirm a signature or its validity by performing verification while using the verifying device holding a verifying key and various kinds of information such as user information in place of a document accepted person, and putting its own signature of the verifying device to the verified result. CONSTITUTION: Holding parts 21-24 respectively hold the user verifying keys, user personal information, user mutual relation information and document information. When a signed document is inputted from a signed document input part 11, a user ID/document type identifying part 12a extracts the user ID of each signing person and the type of that document, a signature verifying part 13 and a signature authority verifying part 14b extract the required user verifying key, user personal information, user mutual relation information and document information from the holding parts 21-24, and the verification of the signature and the verification of signature authority is performed. A signature part 16 puts its own signature of the verifying device held in a verifying device signature holding part 25 to the verified result prepared by a verified result display sentence preparing part 15b, and an output part 17 outputs that result.

Electronic signature verifying device

PURPOSE:To provide a cipher chaining device which can make use of the advantages of a cipher chaining system and a deciphering device for deciphering a cipher text by the cipher chaining device even when a plaintext is only one block long like it is used for certification by eliminating the weakness that starting one block has in a cipher chaining system and increasing the difficulty of deciphering. CONSTITUTION:The ciphering preprocessor which preprocesses the input of the cipher chaining device is provided with a means 11 which inputs an array of plaintexts to be ciphered, a random number generating means 12 which generates a random number array with predetermined bit length, a coupling means 13 which couples the random bit array generated by the random number generating means 12 with the head of the array of plaintexts, and an output means 14 which sends and receives the array consisting of the coupled random numbers and plaintexts to and from the cipher chaining device.

宏宮内

Papers

Cipher key management equipment

Ciphering preprocessor and deciphering postprocessor by cipher

Ciphering and deciphering device for data security protection device

Electronic signature verifying device

Ciphering preprocessor and deciphering postprocessor for cipher chain

宏 宮内

Papers

Cipher key management equipment

Ciphering preprocessor and deciphering postprocessor by cipher

Ciphering and deciphering device for data security protection device

Electronic signature verifying device

Ciphering preprocessor and deciphering postprocessor for cipher chain

宏宮内