摘要:
A communication system including many communication terminals and a management apparatus, which includes: a section which processes user authentication, a first information management section for managing authenticated user information in association with terminal information about the communication terminal used by the user, a second information management section for managing communication information including the user information about many users with intent to communicate with one another, and a connection control section. If the second information management section manages the communication information including the authenticated user information and if the first information management section manages the another user information as part of the communication information, the connection control section sends the terminal information about another communication terminal corresponding to the other user information, to the communication terminal identified by the terminal information in association with the authenticated user information.
摘要:
A multifeed processing apparatus includes a control unit and is connected to a multifeed detecting mechanism and an image reading mechanism. The control unit includes (i) a calculating unit that calculates a shape of a peripheral edge of a medium from any one or both of an output of the image reading mechanism and an image of the medium read by the image reading mechanism, (ii) a detecting unit that detects a change in the shape on a boundary of an overlap detected portion, from the shape calculated by the calculating unit and a position of the overlap detected portion detected by the multifeed detecting mechanism, and (iii) a deciding unit that determines a case where the change in the shape is detected by the detecting unit, as a multifeed.
摘要:
According to one embodiment of the present invention, the first authentication context includes the template certificate indicative of the validity of a template and the first apparatus evaluation certificate indicative of the validity of the first apparatus evaluating information while the second authentication context includes the second apparatus evaluating certificate indicative of the validity of the second apparatus evaluating information. And the template certificate and the first and second evaluation certificates are verified when verifying the first and second authentication contexts. Thus, the validity of the template used for authentication or the apparatus evaluating information included in the authentication context can be verified.
摘要:
A content distribution/browsing system is disclosed. First to (m−1)th encrypted content items E(K1, C1∥K2,1), . . . , E(Km−1, Cm−1∥Km,1) contain second to m-th (next in order) sharing keys K2,1, . . . , Km,1, respectively. When desirous of browsing an (i+1)th content item Ci+1, the (i+1)th sharing key Ki+1,1 is acquired by browsing an immediately preceding i-th content item Ci.
摘要:
A secret sharing apparatus according to the present invention is based on a (k,n)-threshold scheme with a threshold of at least 4 but is still operational with a threshold of at least 2. The secret sharing apparatus generates a generator matrix (G) of GF(2) in which any k of n column vectors are at a full rank, divides secret information into n−1 pieces to generate divided secret data (K(1), . . . , K(n−1)), generates random data (U(0,1), . . . , U(k−2,n−1)), calculates the product of matrixes of the divided secret data, the random data, and the generator matrix (G), assigns the j×(n−1)+ith column of the calculation result to sharing partial data (D(j,i)) to calculate sharing partial data (D(j,1)), generates header information (H(j)), and individually distributes n pieces of sharing information (D(0), . . . , D(n−1)) made up of the header information (H(j)) and sharing partial data (D(j,i)) to n storage apparatuses.
摘要:
A secret sharing device of (k, n) threshold scheme creates a generator matrix G, first divided secret data, and random number data, calculates shared partial data based on the product of matrices with the random number data, the divided secret data, and the generator matrix G, and delivers the shared information formed by the shared partial data and the header information individually to the storage units. The secret sharing device calculates a recovery matrix and multiplies the shared information by the recovery matrix, hence to recover the secret information.
摘要:
A secret sharing device of (k, n) threshold scheme creates a generator matrix G, first divided secret data, and random number data, calculates shared partial data based on the product of matrices with the random number data, the divided secret data, and the generator matrix G, and delivers the shared information formed by the shared partial data and the header information individually to the storage units. The secret sharing device calculates a recovery matrix and multiplies the shared information by the recovery matrix, hence to recover the secret information.
摘要:
A content distribution/browsing system is disclosed. First to (m−1)th encrypted content items E(K1, C1∥K2,1), . . . , E(Km−1, Cm−1∥Km,1) contain second to m-th (next in order) sharing keys K2,1, . . . , Km,1, respectively. When desirous of browsing an (i+1)th content item Ci+1, the (i+1)th sharing key Ki+1,1 is acquired by browsing an immediately preceding i-th content item Ci.
摘要:
A furnace operation system, comprising, a plurality of hollow tubes arranged in place at a position lower than the raw material charging level in the furnace, and running through the body of the furnace, said hollow tubes being arranged in place into a multi-stage shape; a plurality of magnetic sensors arranged for each and every one of a designated number of measuring points selected in a manner of corresponding to the hollow tubes in the vertical direction, within the interior of the plurality of hollow tubes; and a means electrically connected with the plurality of magnetic sensors, which conducts processing of said signals from the said magnetic sensors which are obtained in correspondence to the downward movement of the charge fed into the furnace.
摘要:
A system of detecting a change in the charge put in a metallurgical furnace or the like wherein an magnetic field generator and a magnetic sensing section of a magnetometer arranged along the central axis of the exciting magnetic field of the said magnetic field generator are fitted in place on and/or inserted into a hole of the wall of such a vessel, including a metallurgical furnace or the like, as is enclosed with the said wall, such a change in the exciting magnetic flux passing through the said magnetic sensing section as is given birth by the movement of the charge is picked up in the form of electrical signals, and, the movement, the velocity, the rate of travel, the thickness of the layer, fluctuations in the shape of the layer, the circumferential distribution, the classification, and so forth, of the said charge are enabled to be properly detected in an optional manner through corresponding changes in the said electrical signals.