Patent ID: 9026797
Filing Date: 2015-05-05
Classification: G06K,H04L

Abstract:
1. A server apparatus having a one-time scan code issuing function, the server apparatus comprising: a processor and memory; a database configured to store a Private Key (PRK) of each user; an OTK generating unit configured to generate an One Time Key (OTK) with a valid time, and store the generated OTK and valid time information of the OTK; an PBK generating unit configured to generate a one-time Public Key (PBK) using the PRK and the generated OTK, and store the generated one-time PBK by matching the OTK therewith; a scan code generating unit configured to generate a scan code comprising the generated one-time PBK; a first encrypted-message receiving unit configured to receive a first encrypted-message, which is generated using the OTK by a first encrypted-message generating unit of a user terminal, and the one-time PBK from the user terminal; an OTK searching unit configured to verify validity of the received one-time PBK, and, in response to a verified validity of the one-time PBK, search for the OTK matched with the one-time PBK; and a first encrypted-message decrypting unit configured to decrypt the received first encrypted-message using the found OTK.