Abstract: A management system that manages content data corresponding to a hash value registered in a block of a blockchain. Content data selected by a user from among pieces of content data that are management targets, is provided to a provision destination of the selected content data. Information on the provision destination of the selected content data is registered in a block of the blockchain in association with an identification number for identifying the selected content data. When the management system receives content data that is a target of authenticity determination, an identification number for identifying the content data, and user information of the content data, authenticity of the received content data is determined. In the determination of the authenticity of the received content data, the received user information is compared with the provision destination information registered in the blockchain.

Abstract: A content generation apparatus capable of easily confirming content data, the information of which is registered in a blockchain, is provided. An image pickup apparatus generates an image file and then immediately calculates a hash value of the image file, and transmits image file information including the hash value to a management system. In response to receipt of a registration completion notification indicating that a process of registering the image file information in a blockchain is completed, the image pickup apparatus stores registration-completed information indicating that the image file information is registered in the blockchain, relating to the image file.

Abstract: A content generation apparatus capable of guaranteeing that a provider of a content is a generator of the content is provided. The content generation apparatus that generates a content according to an instruction received from a user includes an acquisition unit configured to acquire biometric information of the user, a biometric authentication unit configured to perform biometric authentication of the user based on the biometric information of the user, a hash value generation unit configured to generate a hash value of the content in a case that the biometric authentication of the user has succeeded, and a communication unit configured to transmit the content and information of the content to a management server that registers the hash value and the information of the content in a blockchain. The information of the content includes result information indicating a result of the biometric authentication of the user.

Abstract: A content management system includes a memory device and at least one processor. The memory device stores a set of instructions. The at least one processor configured to execute the instructions to apply an edition process to a content in accordance with an instruction from an administrator of the content, generate a hash value of an edited content immediately after generating the edited content by the edition process, generate an identification number for identifying the edited content, register the hash value of the edited content and the identification number in a blockchain in association with each other, receive a content subjected to an authenticity determination and an identification number for identifying the content concerned, and determine the authenticity of the received content by comparing a hash value generated from the received content with the hash value registered in the blockchain and corresponding to the received identification number.

Abstract: An imaging apparatus includes at least one memory and at least one processor which function as: an acquisition unit configured to acquire information on an object being focused by another imaging apparatus; and a control unit configured to perform control to display an object item corresponding to the object being focused by the other imaging apparatus on a basis of the information acquired by the acquisition unit.

Abstract: An image capturing apparatus capable of guaranteeing the authenticity of contents while reducing the calculation load of a hash value of an image file. The image capturing apparatus generates an image file, and performs processing for reducing a file size of the image file. A hash value generation section calculates a hash value by applying a hash function to the processed image file. Reduction processing information indicating a method of reducing the file size is generated, and the image file, the hash value, and the reduction processing information are transmitted in a state associated with each other, to a management system that registers data associated with the image file including the hash value in a blockchain.

Abstract: A liquid developer comprising: a toner particle containing binder resin; a carrier liquid; and a basic toner particle dispersing agent, wherein the basic toner particle dispersing agent is a primary amine, an acid value of the binder resin is at least 10 mg KOH/g, an acid value of a component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 5 mg KOH/g, and a hydroxyl value of the component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 10 mg KOH/g.

Abstract: A liquid developer containing: a toner containing a binder resin; a carrier liquid; and a basic toner dispersing agent, wherein the binder resin contains a polylactic acid, the polylactic acid has an acid value of at least 5 mg KOH/g, and a content of the polylactic acid in the binder resin is at least 50 mass %.

Abstract: A liquid developer comprising: a toner particle containing binder resin; a carrier liquid; and a basic toner particle dispersing agent, wherein the basic toner particle dispersing agent is a primary amine, an acid value of the binder resin is at least 10 mg KOH/g, an acid value of a component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 5 mg KOH/g, and a hydroxyl value of the component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 10 mg KOH/g.

Abstract: A liquid developer comprising a toner particle, a carrier liquid, and a basic toner particle dispersing agent, wherein the toner particle contains a polyester resin A, and the polyester resin A contains at least one monomer unit selected from the group consisting of monomer units derived from aliphatic monocarboxylic acids having from 1 to 6 carbons and monomer units derived from aromatic monocarboxylic acids having from 7 to 12 carbons.

Abstract: The liquid developer according to the present invention includes a toner particle containing a polyester resin and a pigment and includes a carrier liquid comprising a nonaqueous solution, the polyester resin contains a monomer unit derived from trimellitic acid, and the content of the monomer unit derived from trimellitic acid in the total acid component-derived monomer unit constituting the polyester resin is from 2.0 mol % to 60.0 mol %, the polyester resin also contains a monomer unit derived from an ethylene oxide adduct on bisphenol A, and the content of the monomer unit derived from the ethylene oxide adduct on bisphenol A in the total alcohol component-derived monomer unit constituting the polyester resin is from 50.0 mol % to 100.0 mol %, and the average circularity of the toner particle is at least 0.950.

Abstract: A liquid developer comprising a toner particle containing a binder resin and a carbon black, a toner particle dispersing agent, and a carrier liquid, wherein amounts of group 15 elements, group 16 elements, and group 17 elements on a surface of the carbon black are respectively 0.1 atomic percent or less with respect to a total amount of elements on the carbon black surface.

Abstract: A curable liquid developer containing: a toner particle containing a pigment and a binder resin; a toner particle dispersing agent; and a cationically polymerizable liquid monomer, wherein the binder resin contains a polyester resin having an acid value of at least 5 mg KOH/g; the polyester resin contains an alcohol component-derived monomer unit and an acid component-derived monomer unit; the alcohol component-derived monomer unit and the acid component-derived monomer unit contain specific monomer units in specific proportions; and the content of the polyester resin in the binder resin is at least 50 mass % and not more than 100 mass %.

Abstract: A curable liquid developer including: a toner particle containing a binder resin and a pigment; a toner particle dispersing agent; and a cationically polymerizable liquid monomer that does not dissolve the binder resin, wherein the pigment contains a copper phthalocyanine derivative represented by formula (1) below; in formula (1), each of R1, R2, R3 and R4 individually represents a hydrogen atom or a substituent derived from an amine compound, and at least one of R1, R2, R3 and R4 represents a substituent derived from an amine compound.

Abstract: A curable liquid developer containing a radical-polymerizable liquid monomer, a photopolymerization initiator, a toner particle being insoluble in the radical-polymerizable liquid monomer, and an amine compound, wherein the amine compound contains an amino group and at least one group selected from the group consisting of an alkyl group having at least 6 carbon atoms, a cycloalkyl group having at least 6 carbon atoms, an alkylene group having at least 6 carbon atoms and a cycloalkylene group having at least 6 carbon atoms, and an amine value of the amine compound is at least 2 mg KOH/g and not more than 200 mg KOH/g.

Abstract: A liquid developer containing a curable insulating liquid, a cationic polymerization initiator, and a toner particle containing a binder resin and carbon black, wherein the carbon black is basic, or wherein the toner particle contains a carbon black dispersing agent, and the carbon black dispersing agent has a dispersing group and an adsorptive group, and the adsorptive group is an amino group.

Abstract: A liquid developer comprising a toner particle containing a binder resin and a carbon black, a toner particle dispersing agent, and a carrier liquid, wherein amounts of group 15 elements, group 16 elements, and group 17 elements on a surface of the carbon black are respectively 0.1 atomic percent or less with respect to a total amount of elements on the carbon black surface.

Abstract: Provided is a magnetic toner which exhibits a high degree of blackness and high tinting strength, and in which scraping of a toner carrying member surface by the magnetic toner is not caused, and image defects such as fogging and tailing are suppressed. A magnetic toner comprising a magnetic toner particle that contains a binder resin and a magnetic iron oxide particle, wherein, the number-average particle diameter of the magnetic iron oxide particle ranges from 0.05 ?m to 0.15 ?m, and a relationship between the number-average particle diameter (?m) of the magnetic iron oxide particle and the specific surface area (m2/g) of the magnetic iron oxide particle satisfies Expression (1) below. [Number?average particle diameter]×[specific surface area]?1.10??(1).

Abstract: A toner comprising a binder resin and a wax, wherein the binder resin contains a binder resin A and a binder resin B, the binder resin A has a softening point of at least 120° C. and not more than 150° C., has a polyester unit, and has a terminal of which a first aliphatic compound having a melting point of 60° C. or more and not more than 85° C. has been condensed, and the binder resin B has a softening point of at least 80° C. and not more than 115° C., has a polyester unit, and has a terminal of which a second aliphatic compound having a melting point of 90° C. or more and not more than 120° C. has been condensed.

Abstract: Provided is a toner that shows both developability and electrostatic offset resistance. The toner includes a charge controlling agent that is represented by the following formula (1), and that has peaks at 15.000°±0.150° and 20.100°±0.150° in CuK? X-ray diffraction spectrum obtained in 2? range of 10° or more to 40° or less where ? represents Bragg angle, one of the peaks being a peak having a maximum intensity and the other being a peak having a second maximum intensity.