Host device, semiconductor memory device, and authentication method

Patent metadata

Field	Value
Publication number	US-8990571-B2
Application number	US-201314135428-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Jan 16, 2012
Publication date	Mar 24, 2015
Grant date	Mar 24, 2015

Abstract

According to one embodiment, encrypted secret identification information (E-SecretID) and the key management information (FKB) are read from a memory device. Encrypted management key (E-FKey) is obtained using the key management information (FKB) and index information (k). The index information (k) and the encrypted management key (E-FKey) are transmitted to the semiconductor memory device. An index key (INK) is generated using the first key information (NKey) and the received index information (k). The encrypted management key (E-FKey) is decrypted using the index key (INK) to obtain management key (FKey), which is transmitted to the host device.

First claim

What is claimed is:

1. A memory card comprising:
a controller; and
a memory device controlled by the controller, and storing secret data, encrypted secret data, and family key block data, the secret data being prohibited from being read, the encrypted secret data and the family key block being readable,
wherein the memory device includes:
a first area which stores a data element for an authentication process and is unreadable;
a second area which stores the encrypted secre…

Assignees

• Toshiba Kk

Inventors

• Kato Taku
• Matsushita Tatsuyuki
• Nagai Yuji

Classifications

• H04L9/0861 Primary

  Electricity · mapped topic

• H04L9/0833

  Electricity · mapped topic

• H04L2209/601

  Electricity · mapped topic

• H04L9/32

  Electricity · mapped topic

• H04L9/0816 Primary

  Electricity · mapped topic