| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor storage device, a host device and an authentication method of the same which are advantageous for preventing the unauthorized use of confidential information. <P>SOLUTION: Provided is an authentication method for authenticating a host device by a semiconductor storage device. The semiconductor storage device holds first key information (NKey) to be kept secret and includes a random-number generation section. The host device holds source information (HC) and second key information (HKey) to be kept secret. The authentication method comprises the steps of: by the semiconductor storage device, generating third key information (HKey) based on the source information (HC) and the first key information (NKey); by the semiconductor storage device, generating a first session key (SKey) based on the third key information (HKey) and the random number generated by the random-number generation section; and by the host device, generating a second session key (SKey') based on the second key information (HKey) and the random number. <P>COPYRIGHT: (C)2013,JPO&INPIT |
