Patent ID: 7996914
Filing Date: 2011-08-09
Classification: G06F,G06Q,G11C,H04L,Y04S

Abstract:
1. A semiconductor memory card for attaching to and detaching from an electronic device having a unique identifier, the semiconductor memory card comprising: a rewritable nonvolatile memory including (i) an authentication area, which is accessible by the electronic device only when the electronic device is authenticated, and which stores an encryption key, and (ii) a non-authentication area, which is accessible by the electronic device regardless of whether or not the electronic device is authenticated, and which stores encrypted data to be decrypted using the encryption key; an authentication unit operable to perform an authentication process, when the semiconductor memory card attaches to the electronic device, to check whether or not the electronic device is authentic; and an authentication area access control unit operable to permit the electronic device to access the authentication area only when the authentication unit affirmatively authenticates the electronic device, wherein the authentication unit includes: