Patent ID: 8332628
Filing Date: 2012-12-11
Classification: H04L

Abstract:
1. A secured data access method for a low-performance electronic tag, comprising the steps of: in a process of writing data, encrypting and writing by a first reader-writer a message, MSG, into the electronic tag; in a process of reading the data, transmitting by a second reader-writer a data request packet to the electronic tag, the data request packet is adapted to trigger the electronic tag to transmit a data response packet to the second reader-writer; transmitting by the electronic tag to the second reader-writer the data response packet comprising an ID transmitting by the second reader-writer to the trusted third party a key request packet comprising an ID verifying by the trusted third party the identities of the second reader-writer and the first reader-writer for validity respectively in response to the key request packet, and after the verification is passed, transmitting to the second reader-writer a key response packet comprising the ID deriving by the second reader-writer a plain text of the MSG of the electronic tag from the key response packet.