Abstract: An evaluation method executed by a computer, the evaluation method comprising processing of: generating, based on information that indicates a degree of reduction of inference accuracy of a machine learning model to a change in first training data, second training data that reduces the inference accuracy; training the machine learning model by using the second training data; and evaluating the trained machine learning model.

Abstract: A signature control method implemented by a computer, the signature control method including: acquiring, by a processor circuit of the computer, a plurality of pieces of document information and signature information that corresponds to each piece of document information of the plurality of pieces of document information; generating, by the processor circuit of the computer, aggregate signature information obtained by aggregating the signature information that corresponds to the each piece of document information of the plurality of acquired pieces of document information on a basis of the plurality of acquired pieces of document information; and outputting, by the processor circuit of the computer, the generated aggregate signature information in association with aggregate public key information obtained by aggregating public key information that corresponds to the each piece of document information of the plurality of pieces of document information and the plurality of pieces of document information.

Abstract: A recording medium storing a program causing a computer to execute: acquiring, for each model, an attack result of an estimation attack, the acquiring for a respective model being performed by using the respective model and a plurality of data, each model being a model trained by using synthetic data that simulates training data, an amount of the synthetic data for each model being different from each other; specifying, based on the attack result for each model, specific data from among the plurality of data; performing the estimation attack by using the specific data for a specific model of which an amount of the synthetic data is between the amounts of the synthetic data used for any two models; and evaluating, based on an attack result for the specific data and the attack result for each model, a resistance to the estimation attack for the specific model.

Abstract: A storage unit holds a classification model that calculates a confidence score from image data, and a transformation model that is a model for transforming a feature value having fewer dimensions than the image data into the image data and is created such that a set of feature values corresponding to a set of image data follows a probability distribution. A processing unit extracts a feature value according to the probability distribution. The processing unit transforms the feature value into image data using the transformation model and calculates a confidence score corresponding to the image data using the classification model. The processing unit updates, based on the probability distribution and the feature value, a feature value to be input to the transformation model from the feature value to a feature value in such a manner that a confidence score to be calculated is higher than the confidence score.

Abstract: An evaluation method performed by a computer, the evaluation method includes generating a plurality of subsets that contain one or more pieces of training data, based on a set of a plurality of pieces of training data that includes pairs of input data and labels for machine learning, generating a trained model configured to estimate the labels from the input data, for each of the subsets, by performing the machine learning that uses the training data contained in the subsets, and performing evaluation related to aggression to the machine learning in the training data contained in the subsets, for each of the subsets, based on estimation accuracy of the trained model generated by using the training data contained in the subsets.

Abstract: An encryption processing system includes: a first device; second devices; and a third device, wherein the first device generates synthesis keys by selecting public keys of the second devices; generates an intermediate text from confidential texts generated by encrypting secret information by using public keys of the second devices having decryption authority; generates ciphertexts by further encrypting the intermediate text using the synthesis keys; and makes public the ciphertexts, each of the second devices verifies validity of the ciphertexts; generates decryption key fragments by using an own private key; and makes public the decryption key fragments, the third device verifies validity of the decryption key fragments; generates a decryption key by combining decryption key fragments; generates the Intermediate text by decrypting one of the ciphertexts; and makes public the intermediate text, and the second device decrypts the intermediate text using the own private key; and restores the secret information.

Abstract: A non-transitory computer-readable recording medium storing an information processing program for causing a computer to execute processing, the processing including: generating a trigger image by using a generation processing configured to receive an input image and output the trigger image; calculating a first index that determines whether or not the trigger image serves as a backdoor for a trained target model; calculating a second index that determines whether or not the trigger image is included in an image set prepared in advance as prior knowledge; executing machine learning of the generation processing using the first index and the second index; and detecting a backdoor that exists in the target model on a basis of the first index for the trigger image generated by the generation processing in which the machine learning has been executed.

Abstract: A transaction management device includes: a memory; and a processor coupled to the memory. The processor is configured to register, into a database, with respect to a first blockchain that stores a plurality of transactions with which first information and second information are associated, a plurality of multiple pieces of the second information in the plurality of transactions in units of groups based on the first information; and register, into a second blockchain, hash values obtained by hashing the plurality of pieces of second information in the units cf groups.

Abstract: A method may include obtaining a set of multivariate quadratic polynomials associated with a multivariate quadratic problem and generating an Ising Model connection weight matrix “W” and an Ising Model bias vector “b” based on the multivariate quadratic polynomials. The method may also include providing the matrix “W” and the vector “b” to an annealing system configured to solve problems written according to the Ising Model and obtaining an output from the annealing system that represents a set of integers. The method may also include using the set of integers as a solution to the multivariate quadratic problem.

Abstract: A non-transitory computer-readable storage medium storing a program that causes a processor included in a computer to execute a process, the process includes calculating, by using a tolerance being predetermined and information on a Hamiltonian, a half adjust position with which an error of the Hamiltonian between a numerical value of the Hamiltonian before approximation of the Hamiltonian and the numerical value of the Hamiltonian after the approximation of the Hamiltonian is smaller than or equal to the tolerance, and performing integerization on the numerical value of the Hamiltonian based on the half adjust position.

Abstract: An encryption processing system includes: a first device; second devices; and a third device, wherein the first device generates synthesis keys by selecting public keys of the second devices; generates an intermediate text from confidential texts generated by encrypting secret information by using public keys of the second devices having decryption authority; generates ciphertexts by further encrypting the intermediate text using the synthesis keys; and makes public the ciphertexts, each of the second devices verifies validity of the ciphertexts; generates decryption key fragments by using an own private key; and makes public the decryption key fragments, the third device verifies validity of the decryption key fragments; generates a decryption key by combining decryption key fragments; generates the Intermediate text by decrypting one of the ciphertexts; and makes public the intermediate text, and the second device decrypts the intermediate text using the own private key; and restores the secret information.

Abstract: A method may include obtaining a set of multivariate quadratic polynomials associated with a multivariate quadratic problem and generating an Ising Model connection weight matrix “W and an Ising Model bias vector “b” based on the multivariate quadratic polynomials. The method may also include providing the matrix “W” and the vector “b” to an annealing system configured to solve problems written according to the Ising Model and obtaining an output from the annealing system that represents a set of integers. The method may also include using the set of integers as a solution to the multivariate quadratic problem.

Abstract: A power supply device comprises plural battery cells having electrode portions, and bus bars connecting the electrode portions of the plural battery cells each other. The bus bar comprises a thin portion thinner than the other portion formed in at least one part of the end edge of the bus bar, and are welded to the electrode portion of the battery cell through the thin portion. The electrode portion comprises a pedestal portion, and an electrode terminal projecting from the pedestal portion, and the thin portion is disposed at the side surface of the electrode terminal. By this, at the time of welding the bus bar the thin portion is directly welded to the electrode portion, and without using other parts of the welding ring or the like the welding process is streamlined.

Abstract: An assembled battery comprises: multiple cells 30 each having external terminals including a negative electrode terminal 50 and a positive electrode terminal; a bus bar 40 which connects the external terminal of one of two adjacent cells 30 and that of the other thereof; an electrically-conductive connecting member 70 which connects the external terminal and the bus bar 40 by welding to the external terminal and the bus bar 40; a welding portion 80 welded to the bus bar 40 and the connecting member 70; and a welding portion 82 welded to the external terminal and the connecting member 70. The connecting member 70 comprises an intervening portion 70b connected to the welding portion 80, and a main body portion 70a extending from the intervening portion 70b to the welding portion 82. The intervening portion 70b has a thickness that is smaller than that of the main body portion 70a.

Abstract: A power supply device comprises plural battery cells having electrode portions, and bus bars connecting the electrode portions of the plural battery cells each other. The bus bar comprises a thin portion thinner than the other portion formed in at least one part of the end edge of the bus bar, and are welded to the electrode portion of the battery cell through the thin portion. The electrode portion comprises a pedestal portion, and an electrode terminal projecting from the pedestal portion, and the thin portion is disposed at the side surface of the electrode terminal. By this, at the time of welding the bus bar the thin portion is directly welded to the electrode portion, and without using other parts of the welding ring or the like the welding process is streamlined.

Abstract: An assembled battery comprises: multiple cells 30 each having external terminals including a negative electrode terminal 50 and a positive electrode terminal; a bus bar 40 which connects the external terminal of one of two adjacent cells 30 and that of the other thereof; an electrically-conductive connecting member 70 which connects the external terminal and the bus bar 40 by welding to the external terminal and the bus bar 40; a welding portion 80 welded to the bus bar 40 and the connecting member 70; and a welding portion 82 welded to the external terminal and the connecting member 70. The connecting member 70 comprises an intervening portion 70b connected to the welding portion 80, and a main body portion 70a extending from the intervening portion 70b to the welding portion 82. The intervening portion 70b has a thickness that is smaller than that of the main body portion 70a.

Abstract: The invention provides a solder structure which is least likely to develop Sn whiskers and a method for forming such a solder structure. The solder structure includes an Sn alloy capable of a solid-liquid coexistent state and an Au (or Au alloy) coating covering at least part of the surface of the Sn alloy. The Au covering is a film that covers and coats at least part of the surface of the Sn alloy. As a preferable mode, the Au coating forms a netlike structure on the surface of the Sn alloy. The thickness of the Au coating is, for instance, 1 to 5 ?m.

Abstract: Provided are a circuit board with enhanced moisture resist and the method of manufacturing the circuit board, and a circuit device and a method of manufacturing the circuit device. A circuit board of the present invention includes: a substrate; wirings formed on the main surface of the substrate; a cover layer covering the wirings excluding the regions to be connectors; back electrodes formed on the bottom surface of the substrate; and through-hole electrodes formed so as to penetrate the substrate, and thereby connecting the wirings and the back electrodes. On surfaces of each of the wirings in this circuit board, convex portions on the periphery of the substrate are set larger in width than convex portions in a center portion of the substrate. With this configuration, adhesion reliability between the wirings and the cover layer under a thermal cycle load can be enhanced.

Abstract: A device mounting board includes: an insulating resin layer; a wiring layer formed on one of the principal surfaces of the insulating resin layer; a protection layer covering the insulating resin layer and the wiring layer; a protruding electrode electrically connected to the wiring layer, the protruding electrode protruding from the wiring layer toward the insulating resin layer and penetrating through the insulating resin layer; a wiring-layer-side convex portion protruding from the wiring layer toward the insulating resin layer and having the top end thereof located inside the insulating resin layer; and a resin-layer-side convex portion protruding from the protection layer toward the insulating resin layer and having the top end thereof located inside the insulating resin layer.

Abstract: The invention provides a solder structure which is least likely to develop Sn whiskers and a method for forming such a solder structure. The solder structure includes an Sn alloy capable of a solid-liquid coexistent state and an Au (or Au alloy) coating covering at least part of the surface of the Sn alloy. The Au covering is a film that covers and coats at least part of the surface of the Sn alloy. As a preferable mode, the Au coating forms a netlike structure on the surface of the Sn alloy. The thickness of the Au coating is, for instance, 1 to 5 ?m.