Patent ID: 7657740
Filing Date: 2010-02-02
Classification: H04L

Abstract:
1. A computer-implemented method for verifying access authority to information by a radio frequency identifier provided by a product having the radio frequency identifier; a first one-time verification key provided by a product database (DB) where the radio frequency identifier, the information relating to the product and the first one-time verification key for verifying the access authority to the information are stored, respectively; and a second one-time verification key provided by a terminal that creates and maintains the second one-time verification key for verifying the access authority to the information, comprising: a step of receiving said radio frequency identifier provided by the product and said one-time verification key provided by the terminal, according to an interface means, and reading a tag added to a product and a tag added to the terminal with a multi-tag reader; a step of acquiring said first one-time verification key provided by said product DB, by searching the product DB with the received radio frequency identifier, by a central processing unit (CPU); a step of determining whether or not there is access authority to the information according to whether or not it is matched by comparing the second one-time verification key provided by the received terminal with the acquired first one-time verification key provided by the product DB, by the CPU; a step of creating a third verification key for use by a second user by using a random number and a hash function just prior to transferring access authority to the information relating to the product from a first user to a second user; a step of transferring the access authority to the information relating to the product from a first user to a second user; and a step of displaying the first one-time verification key and the second one-time verification key on a display device.