Abstract: A method for authenticating electronic money includes storing in a portable apparatus a first biometric digital signature of a registered person who has been registered and authorized to use the portable apparatus, storing in the portable apparatus a public key infrastructure (PKI) certificate that includes a first code derived from encoding the first biometric digital signature of the registered person, acquiring biometric pattern of a person who attempts to access the portable apparatus, determining whether the biometric pattern of the person who attempts to access the portable apparatus is matched with the first biometric digital signature and the first code of the registered person, and in response to determining that the biometric pattern of the person who attempts to access the portable apparatus is matched with the first biometric digital signature and the first code of the registered person, transmitting authentication information to a remote server over a network.

Abstract: A memory device includes: a memory cell array; an input/output circuit controlling inputting and outputting data stored in the memory cell array; an impedance calibration circuit generating an impedance calibration code based on an external resistor connected to an impedance pad for application to the input/output circuit as an applied impedance calibration code; and a calibration control circuit comparing a new impedance calibration code received from the impedance calibration circuit with a calibration code range for generating a calibration code update flag when the new impedance calibration code is included in the calibration code range. The impedance calibration circuit updates the applied impedance calibration code with the new impedance calibration code when receiving the calibration code update flag.

Abstract: A method for authenticating electronic money includes storing in a portable apparatus a first biometric digital signature of a registered person who has been registered and authorized to use the portable apparatus, storing in the portable apparatus a public key infrastructure (PKI) certificate that includes a first code derived from encoding the first biometric digital signature of the registered person, acquiring biometric pattern of a person who attempts to access the portable apparatus, determining whether the biometric pattern of the person who attempts to access the portable apparatus is matched with the first biometric digital signature and the first code of the registered person, and in response to determining that the biometric pattern of the person who attempts to access the portable apparatus is matched with the first biometric digital signature and the first code of the registered person, transmitting authentication information to a remote server over a network.

Abstract: A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes generating, by a user, a first private key and a first public key corresponding to each other; generating, by an nth service provider, an nth private key and an nth public key corresponding to each other; transmitting, from the user to the nth service provider, a level n key; verifying, by the nth service provider, the level n key; generating, by the nth service provider, a level (n+1) key by concatenating the level n key and the nth public key signed with the nth private key; and transmitting, by the nth service provider, the level (n+1) key to the user, where n is a natural number, and when n=1, the level 1 key is the first public key signed with the first private key.

Abstract: A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes abutting a first wearable device belonging to a first party with a second wearable device belonging to a second party; transmitting, by the first wearable device, authentication information of the first party; verifying the authentication information of the first party; transmitting, by the second wearable device, authentication information of the second party; verifying the authentication information of the second party; authorizing electronic transaction in response to successfully verifying both the authentication information of the first party and the authentication information of the second party. Each of the authentication information of the first party and the authentication information of the second party includes information configured for authentication based on a public key infrastructure (PKI) certificate.

Abstract: A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes generating, by a user, a first private key and a first public key corresponding to each other; generating, by an nth service provider, an nth private key and an nth public key corresponding to each other; transmitting, from the user to the nth service provider, a level n key; verifying, by the nth service provider, the level n key; generating, by the nth service provider, a level (n+1) key by concatenating the level n key and the nth public key signed with the nth private key; and transmitting, by the nth service provider, the level (n+1) key to the user, where n is a natural number, and when n=1, the level 1 key is the first public key signed with the first private key.

Abstract: A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes abutting a first wearable device belonging to a first party with a second wearable device belonging to a second party; transmitting, by the first wearable device, authentication information of the first party; verifying the authentication information of the first party; transmitting, by the second wearable device, authentication information of the second party; verifying the authentication information of the second party; authorizing electronic transaction in response to successfully verifying both the authentication information of the first party and the authentication information of the second party. Each of the authentication information of the first party and the authentication information of the second party includes information configured for authentication based on a public key infrastructure (PKI) certificate.

Abstract: A portable device for biometric authentication comprises a sensor and an IC chip. It optionally comprises a one-time password generator. The sensor is configured to acquire a biometric pattern from a user. The IC chip is configured to: store first biometric information of a registered subscriber; store second biometric information that matches or is identical to the first biometric information; determine whether the biometric pattern is matched with the first biometric information and with the second biometric information; and transmit authentication information to a remote server or terminal when the biometric pattern is matched with both the first biometric information and the second biometric information.

Abstract: A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes generating, by a user, a first private key and a first public key corresponding to each other; generating, by an nth service provider, an nth private key and an nth public key corresponding to each other; transmitting, from the user to the nth service provider, a level n key; verifying, by the nth service provider, the level n key; generating, by the nth service provider, a level (n+1) key by concatenating the level n key and the nth public key signed with the nth private key; and transmitting, by the nth service provider, the level (n+1) key to the user, where n is a natural number, and when n=1, the level 1 key is the first public key signed with the first private key.

Abstract: A method for authenticating electronic money includes storing in a portable apparatus a first biometric digital signature of a registered person who has been registered and authorized to use the portable apparatus, storing in the portable apparatus a public key infrastructure (PKI) certificate that includes a first code derived from encoding the first biometric digital signature of the registered person, acquiring biometric pattern of a person who attempts to access the portable apparatus, determining whether the biometric pattern of the person who attempts to access the portable apparatus is matched with the first biometric digital signature and the first code of the registered person, and in response to determining that the biometric pattern of the person who attempts to access the portable apparatus is matched with the first biometric digital signature and the first code of the registered person, transmitting authentication information to a remote server over a network.

Abstract: A portable apparatus includes one or more biometric sensors, one or more memories, and one or more processors operative to execute program instructions from the one or more memories. A public key infrastructure (PKI) certificate, which is stored in the one or more memories, includes a first code derived from encoding a first biometric digital signature of a person who has been registered and authorized to use the portable apparatus. The one or more processors cause the portable apparatus to acquire, by the one or more biometric sensors, biometric pattern of a person who attempts to access the portable apparatus; determine whether the biometric pattern is matched with the first biometric digital signature and the first code; and in response to determining that the biometric pattern is matched with the first biometric digital signature and the first code, transmit authentication information to a remote server over a network.

Abstract: A method of registering a person as an authorized user of a portable device includes acquiring biometric data or a combination of pieces of biometric data of a person, encrypting the acquired biometric data or the combination of pieces of biometric data of the person, generating a code from the encrypted biometric data or the combination of pieces of biometric data of the person, inserting the code in an extension field of a public key certificate stored in the portable device, generating a private key and a public key that corresponds to the private key, based on the public key certificate, wherein the private key contains the code, transmitting the public key to a remote entity that is in communication with the portable device, thereby enabling the remote entity to register the person as an authorized user of the portable device, and modifying the public key to generate a modified public key configured to be used in case that the remote entity is disconnected from a service providing server.

Abstract: A method of registering a person as an authorized user of a portable device includes acquiring biometric data or a combination of pieces of biometric data of a person, encrypting the acquired biometric data or the combination of pieces of biometric data, generating a code from the encrypted biometric data or the combination of pieces of biometric data, inserting the code in an extension field of a public key certificate stored in the portable device, generating a private key and a public key that corresponds to the private key, based on the public key certificate, wherein the private key contains the code, and transmitting the public key to a remote entity, thereby enabling the remote entity to register the person as an authorized user of the portable device. The extension field of the public key certificate further contains a code associated with identification information of the person.

Abstract: A portable device for biometric authentication includes a sensor configured to acquire a biometric pattern from a user who attempts to access the portable device, a biometric information storage section configured to store biometric information of a registered subscriber who has been registered to be authorized to use the portable device, a public key certificate storage section configured to store a public key certificate, and a biometric information matching section operatively coupled to the sensor, the biometric information storage section, and the public key certificate storage section. In particular, biometric information that matches the registered subscriber's biometric information is encoded and inserted into the public key certificate, and the biometric information matching section authenticates in response to determining that the user's biometric pattern acquired by the sensor matches the registered subscriber's encoded biometric information inserted in the public key certificate.

Abstract: A portable apparatus includes one or more biometric sensors, one or more memories, and one or more processors operative to execute program instructions from the one or more memories. A public key infrastructure (PKI) certificate, which is stored in the one or more memories, includes a first code derived from encoding a first biometric digital signature of a person who has been registered and authorized to use the portable apparatus. The one or more processors cause the portable apparatus to acquire, by the one or more biometric sensors, biometric pattern of a person who attempts to access the portable apparatus; determine whether the biometric pattern is matched with the first biometric digital signature and the first code; and in response to determining that the biometric pattern is matched with the first biometric digital signature and the first code, transmit authentication information to a remote server over a network.

Abstract: The present invention relates to a system and a method for authenticating an electronic money using a smart card and a communication terminal. The present invention provides a system and a method for authenticating an electronic money, wherein the system comprises a smart card and a communication terminal. The smart card takes biometric signature from a user as an input, transmits recognition completion information to the communication terminal when the biometric signature inputted by the user matches the stored biometric signature, receives an update command from the communication terminal, updates the amount of stored balance data, and transmits an update completion message to the communication terminal. The communication terminal is connected to the smart card in a wired or wireless manner, and transmits the update command to the smart card upon receipt of the recognition completion information.

Abstract: The present invention relates to a system and a method for authenticating an electronic money using a smart card and a communication terminal. The present invention provides a system and a method for authenticating an electronic money, wherein the system comprises a smart card and a communication terminal. The smart card takes biometric signature from a user as an input, transmits recognition completion information to the communication terminal when the biometric signature inputted by the user matches the stored biometric signature, receives an update command from the communication terminal, updates the amount of stored balance data, and transmits an update completion message to the communication terminal. The communication terminal is connected to the smart card in a wired or wireless manner, and transmits the update command to the smart card upon receipt of the recognition completion information.

Abstract: A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes receiving, by an nth party, an (n?1)th modified public key from an (n?1)th party; generating, by the nth party, an nth private key and an nth public key corresponding to each other; generating, by the nth party, an nth modified public key by concatenating the (n?1)th modified public key and the nth public key signed with the nth private key; and transmitting, by the nth party, the nth modified public key, where n is a natural number greater than 1, and when n=2, the first modified public key is the first public key signed with the first private key.

Abstract: A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes abutting a first wearable device belonging to a first party with a second wearable device belonging to a second party; transmitting, by the first wearable device, authentication information of the first party; verifying the authentication information of the first party; transmitting, by the second wearable device, authentication information of the second party; verifying the authentication information of the second party; authorizing electronic transaction in response to successfully verifying both the authentication information of the first party and the authentication information of the second party. Each of the authentication information of the first party and the authentication information of the second party includes information configured for authentication based on a public key infrastructure (PKI) certificate.

Abstract: A method for sequential authentication based on chain of authentication using public key infrastructure (PKI) is provided. The method includes generating, by a user, a first private key and a first public key corresponding to each other; generating, by an nth service provider, an nth private key and an nth public key corresponding to each other; transmitting, from the user to the nth service provider, a level n key; verifying, by the nth service provider, the level n key; generating, by the nth service provider, a level (n+1) key by concatenating the level n key and the nth public key signed with the nth private key; and transmitting, by the nth service provider, the level (n+1) key to the user, where n is a natural number, and when n=1, the level 1 key is the first public key signed with the first private key.