Nippon Telegraph and Telephone Corporation

Kaku Takeuchi

Tetsutaro Kobayashi

Sakae Chikara

Gen Takahashi

Katsuya Arai

Takahiko Yoshida

Tetsuyuki Muto

Masakazu Kanbe

Jin Hiwatashi

Atsushi Kanai

Toru Kawamura

Tomotaka Uchihashi

Fumihiko Magata

Hideaki Yamamoto

An assistance device () includes: a first storage unit () storing therein characteristic words related to risks; a second storage unit () storing therein pieces of risk countermeasure information related to risk countermeasures; an extraction unit () that extracts a word from an input character string, searches in the first storage unit for a characteristic word that is same as or similar to the word, and extracts one of the pieces of risk countermeasure information corresponding to the characteristic word from the second storage unit; and a presentation unit () that presents the extracted piece of risk countermeasure information.

Support device, support method, program, and support system

A system, a method, and a program for automatically creating a command that is used to establish a network in a virtual machine environment is provided. The system includes a network establishing terminal that includes a command creation function and at least one server device that provides a virtual machine environment in which a virtual machine operates, wherein the network establishing terminal automatically creates at least one command that is used to establish a network in the virtual machine environment based on network design information and information regarding the virtual machine environment.

System, method, and program

Attack cases (for example, including attack details, countermeasures, and the like) of each device forming each attack path are derived by comprehensively extracting attack paths assumed for a target system. An information processing device D includes: an input unit () configured to read a list of a device group included in a system and a list of connection relations between devices; an attack path extracting unit () configured to extract an attack path on the basis of the list of the device group and the list of the connection relations read by the input unit (); an attack case DB unit () configured to store a past attack case in association with an attack phase and a node condition at a time when the attack case occurred; an attack case search unit () configured to determine an attack phase and a node condition of each device serving as each node configuring the attack path extracted by the attack path extracting unit () and acquire an attack case corresponding to each device by searching the attack case DB unit () using the determined attack phase and the determined node condition; and an output unit () configured to output a result of the search.

Information processing device and information processing method

A cryptographic communication technology that is based on functional encryption and that can operate flexibly is provided. A conversion rule information pair is determined in advance, which has attribute conversion rule information prescribing a conversion rule for converting attribute designation information to attribute information used in a functional encryption algorithm and logical expression conversion rule information prescribing a conversion rule for converting logical expression designation information to logic information used in the functional encryption algorithm. One kind of conversion rule information included in the conversion rule information pair is used to obtain first attribute information or first logic information from input information. The first attribute information or the first logic information is used for encryption. Encryption information is decrypted with a decryption key generated by using second attribute information or second logic information obtained from user information by using the other kind of conversion rule information.

Cryptographic system, cryptographic communication method, encryption apparatus, key generation apparatus, decryption apparatus, content server, program, and storage medium

A cryptographic communication technology that is based on predicate encryption and that can operate flexibly is provided. A conversion rule information pair is determined in advance, which has attribute conversion rule information prescribing a conversion rule for converting attribute designation information to attribute information used in a predicate encryption algorithm and predicate conversion rule information prescribing a conversion rule for converting predicate designation information to predicate information used in the predicate encryption algorithm. One kind of conversion rule information included in the conversion rule information pair is used to obtain first attribute information or first predicate information from input information. The first attribute information or the first predicate information is used for encryption. Encryption information is decrypted with a decryption key generated by using second attribute information or second predicate information obtained from user information by using the other kind of conversion rule information.

A calculation &#x3a0;e(R(i, 0), . . . , R(i, K&#x2212;1)) where a calculation of K elements R(i, k)&#x3b5;GF(p) of a finite field GF(p) over a finite field is expressed as e(R(i, 0), . . . , R(i, K&#x2212;1)) is efficiently performed. Polynomials poly(R(i, 0), . . . , R(i, K&#x2212;1)) that express a d-th-order extension field of the finite field GF(p), which are obtained by the calculations e(R(i, 0), . . . , R(i, K&#x2212;1)) for different values of i, are multiplied by each other, and a cumulative multiplication of the products is performed, for example. The polynomial poly(R(i, 0), . . . , R(i, K&#x2212;1)) is a mapping from the input elements of the finite field GF(p), and the coefficients of at least some of the terms thereof are 0. The same process is performed for different sets of values of i, and the calculation &#x3a0;e(R(i, 0), . . . , R(i, K&#x2212;1)) is performed using the result.

Finite field calculation apparatus, finite field calculation method and recording medium

An advertisement posting scheme utilizes a comprehensive information viewing device capable of displaying multiple Web pages on a display screen by enlarging or contracting each Web page at arbitrary magnification rate smoothly, rotating each Web page at arbitrary angle smoothly, arbitrarily varying and controlling transparency level of a plurality of Web pages that are arranged in superposition such that any overlapped hidden portion can be made visible, and three-dimensionally arranging the multiple Web pages such that the multiple Web pages can be viewed from arbitrary angle, for the purpose of displaying advertisements on the display screen at arbitrary positions, angles, sizes and transparency levels, in relation to the multiple Web pages.

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Tokyo, Japan

Kaku Takeuchi