Ntt Docomo, Inc.

Nippon Telegraph and Telephone Corporation

Atsuki Tomioka

Nobuyuki Watanabe

Kazuhiro Yamada

Dai Kamiya

Mao Asai

Masayuki Tsuda

Satoshi Washio

Hiroshi Ogawa

Takao Nakamura

Naoki Naruse

Masakazu Nishida

Masato Takeshita

Keiichi Murakami

Youichi Takashima

Naoki Yamane

Yasunori Hattori

Yuichi Ichikawa

Tatsuro Oi

Fumiaki Miura

Hiroshi Kawabata

Takashi Kondo

Tomonori Nakamura

Hisanori Sawada

Hideaki Nishio

Takashi C Kondo

Mobile unitwhich can activate Java-AP software receives SDF (Security Descriptive File)from administering server unitwhich a trustworthy organization (a communication provider which administers mobile packet communication network) administers, and obtains ADFfrom IP server unitby using URL contained in the SDF, and obtains Jar filefrom IP server unitby using ADF, and installs in itself Java-AP containing these files. Java-AP, which is achieved by activating the installed Java-AP software, operates within the range of authorization expressed by policy information contained in SDF

Contents transmission method and contents transmission system

A method for embedding a watermark into digital data, when the watermark is to be embedded in a digital image, independently changes real number components and imaginary number components of each of coefficient values of a complex watermark coefficient matrix using key, from the watermark to be embedded in the digital image, a step for performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern; and a step for adding like tiling the water mark pattern to the original image, and generating an embedded image. Further more, a watermark detection method for detecting a watermark from a digital data, a step for separating a block from an arbitrary position on the detected object image, a step for performing a discrete Fourier transform on the block and obtaining a sequence matrix, a step for generating position information for a component that is to be detected and that is specified by the key, a step for detecting a position marker sequence by calculating a phase difference of a sequence by an amount of parallel displacement, for each item of the position information, and extracting offset information which is the amount of parallel displacement when there is agreement between a start point of an embedded watermark and a start point of the block cut from the detected object image, and a step for detecting the embedded watermark cut from the detected object image.

Digital watermark embedding method, digital watermark embedding apparatus, and storage medium storing a digital watermark embedding program

The present invention provides an information processing device for estimating usage of contents and properly limiting functions realized through use of the contents in accordance with the estimation. Usage of contents is estimated by determining in which of cache memory means and content storage means the contents are stored. When the contents are processed or executed, it is determined whether to limit functions realized through processing or execution of the contents, on the basis of the estimated usage of the contents and function limit information showing a rule regarding limits on functions realized through processing or execution. On the basis of the determination, the functions realized through processing or execution of the contents are limited.

Information processing device and program

A method for embedding a watermark into digital data by independently changing real and imaginary number components of the coefficient values of a complex watermark coefficient matrix using a key, performing a discrete Fourier inverse transform on the sequence matrix of the changed watermark and generating a watermark pattern, adding like tiling the water mark pattern to the original image, and generating an embedded image. A watermark detection method includes separating a block from an arbitrary position on the detected object image, performing a discrete Fourier transform on the block and obtaining a sequence matrix, generating position information for a component which is to be detected and is specified by the key, detecting a position marker sequence by calculating a phase difference of a sequence by a parallel displacement, for the position information, extracting offset information, and detecting the embedded watermark from the detected object image.

In a terminal device equipped with a function of running an application program, operation of an application program is suspended when an event is detected, the type of the event is predetermined, and event data representing the detected event is stored. Then, the terminal device delivers stored event data to the application program, after the suspended application is resumed.

Terminal device and program

A method for embedding digital watermark data in digital data contents includes the steps of obtaining a frequency coefficient of block data of digital data contents, obtaining a complexity of the block data, obtaining an amount of transformation of the frequency coefficient from the complexity and the digital watermark data, and embedding the digital watermark data by transforming the frequency coefficient. In addition, a method for reading digital watermark data includes the steps of calculating a probability of reading '1' or '0' in a read bit sequence by using a test method on the basis of binary distribution, determining the presence or absence of digital watermark data according to the probability, and reconstituting digital watermark data. Another method includes the steps of performing soft decision in code theory by assigning weights to the digital watermark sequence with a weighting function, and reconstituting digital watermark data.

Method and apparatus for digital watermarking

A native mailer operated in accordance with a native program installed by a manufacturer of mobile phoneobtains an e-mail generated by using an application mailer. A native mailer obtains an e-mail, and stores in a folder for an application mailer, an e-mail generated by using an application mailer.

Communication terminal operational with multiple applications

Mobile unitwhich can activate Java-AP software obtains ADFfrom IP server unit, receives SDF (security descriptive file)by using ADFfrom administering server unitwhich a trustworthy organization (a communication provider which administers mobile packet communication network) administers, and obtains Jar fileby using ADFfrom IP server unit. Then, mobile unitinstalls Java-AP software containing these files. Java-AP, which is achieved by activating the installed Java-AP software, operates within the range of authorization expressed by policy information contained in SDF

Distribution method, distribution system, and terminal device

The present invention provides a means for determining authenticity of a combination of files which are downloaded to a mobile station, and which are related to one another. To achieve the stated object, in a system according to the present invention, mobile station, which is capable of running a Java-APP, receives an ADF from CP server device. Then mobile stationreceives a SDF from trusted server device, which is identified by data contained in the ADF. Mobile stationcalculates a hash value of certificate data contained in the ADF, and verifies whether the calculated hash value of the certificate data and a hash value of the certificate data which is contained in the SDF are identical to each other. Next, mobile stationreceives a JAR file from CP server device. Mobile stationcalculates a hash value of the JAR file, and verifies whether the calculated hash value of the JAR file and a hash value of the JAR file contained in the ADF are identical to each other.

Communication device and program

Mobile unitwhich can activate Java-AP software receives SDF (Security Descriptive File)from administering server unitwhich a trustworthy organization (a communication provider which administers mobile packet communication network) administers, and obtains ADFfrom IP server unitby using URL contained in the SDF, and obtains Jar filefrom IP server unitby using ADFand installs in itself Java-AP containing these files. Java-AP, which is achieved by activating the installed Java-AP software, operates within the range of authorization expressed by policy information contained in SDF

Content delivery method and content delivery system

The present invention provides a means for reflecting modifications made in a server to data with regard to a scope of rights, which are granted to an application program operable in a communication device such as a mobile station, on data stored in the communication device. To achieve the aim, in a system according to the present invention, Java-AP software is provided to a mobile station by transmitting an ADF, a SDF and a JAR file from servers to the mobile station in that order. The SDF is a file containing data indicating restrictions of behavior of a Java-AP in a mobile station. The SDF also contains data indicating a validity state of the SDF, namely 'valid' or 'invalid', which is managed by management server device. Before a mobile station runs a Java-APP which is installed in the mobile station, the mobile station accesses management server deviceand checks whether a SDF corresponding to the Java-APP is valid. When the SDF is valid, the mobile station runs the Java-APP following the restrictions indicated in the SDF.

Communication device, control method of communication device, program and communication method

Specific commands are contained in an application program executed in a communication terminal device, and when those commands are executed, operation of the application program is suspended by the communication terminal device and the application program is upgraded.

Growing community of inventors

Yokohama, Japan

Atsuki Tomioka