Eyl Inc.

Seoul National University

Dae Hyun Nam

Jung Hyun Baik

Seong Joon Cho

Bu Suk Jeong

Young Chang Joo

Kang Won Suh

Ji Hoon Lee

Na Rae Kim

Ji Yong Kim

Won Hyo Joo

Yoo Yong Lee

Han Wool Yeon

So Yeon Lee

Tae Jin Lim

Jun Ha Jin

A random number generation method and random number generator using a ZnS scintillator. The random number generator includes: a radioisotope emission layer emitting an alpha particle or a beta particle that is emitted when an atomic nucleus decays; a polymer layer disposed under the radioisotope emission layer; an inorganic scintillator layer disposed between the radioisotope emission layer and the polymer layer and applied with an inorganic scintillator substance; and a wafer layer disposed under the polymer layer and including a photodiode detecting light produced from the inorganic scintillator layer.

Random number generation method and random number generator using inorganic scintillator

A random number generator resistant to side-channel attacks. The random number generator includes an entropy unit generating random pulses, a random frequency clock generator generating random frequencies by receiving random pulses output from the entropy unit, and an MCU externally masking a specific operation or a specific instruction based on a random frequency received from the random frequency clock generator.

Random number generator for defending against subchannel attack, and operation method thereof

A method and a system of providing a quantum random number based on a quantum entropy source. The method includes generating a quantum random number and providing the quantum random number to a device. The generating of the quantum random number based on the quantum entropy source includes determining, by a management unit, whether quantum random numbers stored in a storage are insufficient; generating a quantum random number based on the quantum entropy source using a quantum random number generator provided in a production unit in response to a determination that the quantum random numbers are insufficient; verifying, by a verification unit, the generated quantum random number based on NIST SP800-90B and SP800-22; and in response to quality of the generated quantum number satisfying a criterion, storing the verified quantum random number in the storage.

Method and system for providing quantum random number on basis of quantum entropy source

A pattern authentication method for preventing a smudge and a shoulder surfing attack. The pattern authentication method includes: a pattern registration step; and a pattern authentication step, in which the pattern registration step includes: a step of receiving a pattern from a user by an input unit of a pattern authentication device; a step of matching and storing a code value corresponding to the pattern input from the user by a matching unit; and a step of generating a user KDI (Key Derivation ID) by matching the code value to a quantum random number generated by a quantum random number generator by a KDI generator.

System and user pattern authentication method for preventing smudge and shoulder surfing attack of mobile device

A method of providing a secure communication service using a secure communication device equipped with a quantum-random-number-based encryption chip. The method includes: in response to a first user terminal executing a secure communication device service app for secure communication and inputting a personal information number (PIN) or pattern, performing device authentication between a first user secure communication device and the first user terminal and then performing remote authentication between the first user terminal and a management server; in response to user authentication being completed, generating a quantum secret key a by a quantum encryption chip of the first user secure communication device and transmitting a quantum public key A to a second user secure communication device; and creating, by the first user secure communication device, a speech secure communication channel for communication with the second user secure communication device by inducing and storing the quantum encryption key.

Secure communication device equipped with quantum encryption chip based quantum random number and method of providing secure communication service using the same

Provided is a method of manufacturing MoShaving a 1T crystal structure. The method includes performing phase transition from a 2H crystal structure of MoSto the 1T crystal structure by reacting MoShaving the 2H crystal structure with CO gas. The phase transition includes annealing the MoShaving the 2H crystal structure in an atmosphere including CO gas.

Method of manufacturing MoShaving 1T crystal structure

In order to provide a method for preparing a chalcogenide-carbon nanofiber, capable of implementing oxidation resistance characteristics and process simplification, the present invention provides a method for preparing a chalcogenide-carbon nanofiber and a chalcogenide-carbon nanofiber implemented by using the same, the method comprising the steps of: forming a chalcogenide precursor-organic nanofiber comprising a chalcogenide precursor and an organic material; and forming a chalcogenide-carbon nanofiber by selectively and oxidatively heat treating the chalcogenide precursor-organic nanofiber such that the carbon of the organic material is oxidized and the chalcogenide is reduced at the same time, wherein the oxidation reactivity of the chalcogenide is lower than that of carbon, the selective and oxidative heat treatment is carried out through one heat treatment step instead of a plurality of heat treatment steps, and the chalcogenide can form a chalcogenide-carbon nanofiber having a structure formed with at least one layer according to an oxygen partial pressure at which the selective and oxidative heat treatment is carried out.

Chalcogenide-carbon nanofiber and preparation method therefor

The present invention provides a production method of copper-carbon nanofibers, which can realize oxidation-resistant characteristics and process simplification, the production method comprising the steps of: forming a metal precursor-organic nanofiber comprising a metal precursor and an organic substance; and forming a metal-carbon nanofiber by performing a selective oxidation heat treatment to the metal precursor-organic nanofiber so as to simultaneously oxidize carbon of the organic substance and reduce the metal precursor to a metal, wherein the metal has a lower oxidation resistance than the carbon; the selective oxidation heat treatment is performed through a singly heat treatment step, not a plurality of heat treatment steps; and metal-carbon nanofibers with different structures may be formed according to the amount of partial oxygen pressure under which the selective oxidation heat treatment is performed.

Metal-carbon nanofiber and production method thereof

Provided is a quantum random pulse generator having enhanced security using a phenomenon in which a radioactive isotope naturally collapses. The quantum random pulse generator includes a photodiode detection unit which has a photodiode disposed at the center of the photodiode detection unit on a top surface, a radioactive isotope emission unit which emits alpha particles discharged when an atomic nucleus naturally collapses toward a photodiode, and a plate which is disposed on a top surface of the radioactive isotope emission unit and supports the radioactive isotope emission unit. The alpha particles discharged by the emission unit come into contact with the photodiode to generate a random pulse.

Quantum random pulse generator

Provided is a settlement authentication method and system using a quantum random number generator. The method includes the steps of requesting, by a mobile terminal, a random number from a bank server and a POS terminal each including a quantum random number generator, periodically receiving a first quantum random number generated by the POS terminal and a second quantum random number generated by the bank server, and simultaneously sending a first quantum random number most recently received from the POS terminal to the bank server and a second quantum random number most recently received from the bank server to the POS terminal when the mobile terminal requests settlement.

Method and system using quantum random generator

Provided is an operating method of a random pulse generation apparatus using radioactive isotopes. An operating method of a random pulse generation apparatus using radioactive isotopes includes the steps of includes the steps of emitting alpha particles from a radioactive isotope emission unit, generating a pulse by repeating an operation in which when the alpha particles collide against a CMOS image sensor, the CMOS image sensor breaks down and a reverse current is generated, a first capacitor is connected to a ground and becomes a conduction state to generate a positive pulse, and if the alpha particles do not collide against the CMOS image sensor or the CMOS image sensor does not break down, the first capacitor is not conductive and an output value maintains a ground state, and amplifying the generated pulse by feedback impedance.

Growing community of inventors

Seoul, South Korea

Dae Hyun Nam