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Kubotera
Norikazu Kubotera, Tokyo JP
| Patent application number | Description | Published |
|---|---|---|
| 20100195830 | ELECTRONIC DATA ENCRYPTION AND ENCRYPTED DATA DECRYPTION SYSTEM, AND ITS METHOD - An object of the present invention is to provide an electronic data encryption and decryption system allowing a privileged user to decrypt all encrypted data without using a plurality of secret keys but only by using a single secret key that the privileged user himself has. An electronic data encryption and decryption system includes: a privileged user device, a user device, and an encrypted data generation device. The privileged user device has: a privileged user key generation means for generating a privileged user secret key x and a privileged user public key x·P (P is a generator); a first session key generation means for generating a session key K; and a first decryption means for decrypting the encrypted data by using the session key K generated by the first session key generation means. The user device has: a user key generation means for generating a user secret key r, a user public key r·P, and a public key rx·P; a second session key generation means for generating the session key K; and a second decryption means for decrypting the encrypted data by using the session key K generated by the second session key generation means. The encrypted data generation device has: a third session key generation means for generating the session key K by using the public key rx·P, session key generation information s, and a random point Q; and a means for encrypting the input electronic data by using the session key K generated by the third session key generation means. | 08-05-2010 |
Shigeru Kubotera, Kanagawa JP
| Patent application number | Description | Published |
|---|---|---|
| 20090167299 | METAL DETECTION DEVICE - There is provided a metal detection device capable of effectively detecting a metal mixed in food or the like by generating AC magnetic field simultaneously tuned to respective frequencies by a single transmission coil in response to frequency components of different frequencies without switching an element by a switch or the like. Constituent elements constituting magnetic field generation means ( | 07-02-2009 |
Takaaki Kubotera, Tokyo JP
| Patent application number | Description | Published |
|---|---|---|
| 20110126364 | Process for producing dyed plastic lens - A process which enables a plastic lenses having a refractive index of 1.7 or greater and, in particular, plastic lenses having a refractive index of 1.7 to 1.8 to be dyed uniformly to a great density without unevenness, which is, specifically, a process for producing a dyed plastic lens which comprises conducting following steps (1), (2) and (3) in this order: Step (1): a step comprising coating a substrate at 60° C. or lower with an ink comprising a sublimation dye; Step (2): a step comprising decreasing content of water in the ink comprising sublimation dye coating the substrate to 50% by mass or less of the entire ink; and Step (3): a step comprising, after placing a plastic lens in a manner such that a face for dying of the lens and a face of the substrate coated with the ink comprising a sublimation dye face each other, sublimating the sublimation dye in the ink comprising a sublimation dye coating the substrate by heating the substrate obtained after Step (2) under a degree of vacuum of about 1×10 | 06-02-2011 |
Takaaki Kubotera, Shiga JP
| Patent application number | Description | Published |
|---|---|---|
| 20120015111 | DYED PLASTIC LENS FABRICATION METHOD - Provided is a process for producing a dyed plastic lens in accordance with which in accordance with which deformation and change in the color of the plastic lens can be suppressed and a plastic lens having a refractive index of 1.7 or greater and, in particular, a refractive index of 1.7 to 1.8, can be preferably dyed uniformly to a great density without unevenness. Specifically, the process for producing a dyed plastic lens comprises: Step (1) of coating a substrate comprising glass with a sublimation dye; Step (2) of, after placing a plastic lens in a manner such that a face for dyeing of the plastic lens and a face of the substrate coated with the sublimation dye face each other, sublimating the sublimation dye coating the substrate obtained in Step (1) by heating the substrate under a degree of vacuum of 1×10 | 01-19-2012 |
Yukinori Kubotera, Ashigarakami-Gun JP
| Patent application number | Description | Published |
|---|---|---|
| 20100331604 | TREATMENT APPARATUS - A treatment apparatus which applies a magnetic field of a proper magnitude to a specific place of a treatment object includes a magnetic field generation part provided with first and second core members having end faces arranged oppositely and radiating lines of magnetic force therebetween and coils at the bases of the first and second core members. Additionally, a space adjustment part adjusts a space between the end faces of the first core member and that of the second core member, and a control part controls energization of the coil according to the space between the end face of the first core member and that of the second core member, thereby adjusting the intensity of the magnetic field to be generated by the magnetic field generation part. | 12-30-2010 |
Yukinori Kubotera, Kanagawa JP
| Patent application number | Description | Published |
|---|---|---|
| 20090299349 | LIGHT IRRADIATING DEVICE - A light irradiating device capable of irradiating with a low output energy a lesion or a skin deep portion with light having a high-vasodilating-effect wavelength. Light including a wavelength having a vasodilating effect is emitted from the output portion at the tip end of a probe. The output density of the light is preferably 100 to 1550 mW/mm | 12-03-2009 |