Patent ID: 8650393
Filing Date: 2014-02-11
Classification: G11B,H04L

Abstract:
1. A storage medium comprising: a controller; and a memory device controlled by the controller, wherein the memory device stores first key information, first identification information being unique to the memory device, index information, key management information, and encrypted first identification information, the first key information and the first identification information are prohibited from being read from outside the memory device, the encrypted first identification information is generated by encrypting the first identification information, and the index information, the key management information, and the encrypted first identification information is readable, wherein the controller is configured to: read the key management information from the memory device and send the key management information to an external apparatus in response to receiving a read command for the key management information from the external apparatus, read the encrypted first identification information from the memory device and send the encrypted first identification information to the external apparatus in response to receiving a read command for the encrypted first identification information from the external apparatus, read the index information from the memory device and send the index information to the external apparatus in response to receiving a read command for the index information from the external apparatus, and send second identification information received from the external apparatus and allocated to the external apparatus to the memory device in response to receiving a command for obtaining authentication information from the external apparatus, wherein the memory device is configured to: perform an encryption process using the first key information and the second identification information to generate second key information, perform an encryption process using the second key information and a random number information to generate a third key information, the random number information being received from the external apparatus, perform a one-way conversion process using the third key information and the first identification information to generate the authentication information, and be authenticated by the external apparatus.