Method and system for user authentication using virtual code for authentication

An authentication virtual code verification device for user authentication, the authentication virtual code verification device comprising:

• an authentication virtual code reception unit configured to receive an authentication virtual code and to receive a request for the user authentication;
• a detailed code extraction unit configured to extract one or more detailed codes included in the authentication virtual code;
• a storage location search unit configured to search for an authentication card storage location, at which an authentication card is registered in a storage location search algorithm, based on the extracted one or more detailed codes;
• a user information extraction unit configured to identify a user by extracting user information stored after being matched with the authentication card storage location that is searched by the storage location search unit;
• an authentication virtual code verification unit configured to compare a time point, at which the authentication virtual code reception unit receives the authentication virtual code, with a time point, at which the authentication virtual code is generated by using an authentication virtual code generation function by an authentication virtual code generation means, and to verify the authentication virtual code;
• and
• a user authentication approval unit configured to approve the user authentication when verification of the authentication virtual code is completed,
• wherein, when it is identified by the authentication virtual code verification unit that the generation time point is within an error range from the reception time point, and it is determined that the authentication virtual code is a normal code, the user authentication is approved by the user authentication approval unit, and
• wherein the storage location search algorithm is matched with the authentication virtual code generation function.

An authentication card device for user authentication, the authentication card device comprising:

• an integrated circuit (IC) chip including authentication card data;
• and
• a communication unit configured to provide the authentication card data to an authentication virtual code generation means through wireless communication,
• wherein the authentication card data is specific data assigned to the authentication card device when the authentication card device is manufactured,
• wherein the authentication virtual code generation means generates an authentication virtual code based on the provided authentication card data by using an authentication virtual code generation function and provides the generated authentication virtual code to a server,
• wherein the server receives a user authentication request and the authentication virtual code, and searches for an authentication card storage location, at which the authentication card device is registered, in a storage location search algorithm matched with the authentication virtual code generation function based on the provided authentication virtual code, and extracts user information stored after being matched with the authentication card storage location to identify a user, and
• wherein the server verifies the authentication virtual code, by comparing a reception time point, at which the server receives the authentication virtual code, with a generation time point, at which the authentication virtual code generation means generates the authentication virtual code, and approves the user authentication when the comparison result indicates that the generation time point is within an error range from the reception time point.