US 2011/0219240 A1 · SEMICONDUCTOR MEMORY DEVICE AND METHOD FOR REALIZING SECURE DATA STORAGE

Abstract

A semiconductor memory device includes a controller module as well as a universal interface module and a semiconductor memory medium module, which are connected electrically with the controller module respectively. The device also includes a one-time programmable memory, which stores a unique serial number. This one-time programmable memory is provided within the controller module or the semiconductor memory medium module. The number sequence of the unique serial number contained in each of the semiconductor memory device is different from that of another semiconductor memory device. While providing a mobile data storage function, this invention adopts a security technology to prevent from illegal data reading/writing. This increases significantly the difficulty in decrypting the data of a legal user, subsequently improving the security of the stored data of the user greatly. This invention also provides a method for realizing secure data storage with this semiconductor memory device. With the help of the unique serial number in this semiconductor memory device, the user can protect the stored data. This invention can be extensively used in information security fields, including ID authentication, copyright protection, etc.

Claims12

Dependent claims

A semiconductor memory device comprising:

a controller module;
a universal interface module;
a semiconductor memory medium module, wherein the universal interface module and the semiconductor memory medium module are connected electrically with the controller module;
and
a one-time programmable memory configured to store a unique serial number, wherein the one-time programmable memory is provided within the controller module or the semiconductor memory medium module;
wherein a number sequence of the unique serial number contained in each of the semiconductor memory device is different from that of another semiconductor memory device.

3 more elements

A method for realizing secure data storage using a semiconductor memory device, including the following steps:

(1) configuring a semiconductor memory device that includes a controller module, a universal interface module, and a semiconductor memory medium module, wherein the universal interface module and the semiconductor memory medium module are connected electrically with the controller module;
(2) dividing the semiconductor memory medium module into at least two logic storage spaces;
(3) employing at least one of the logic storage spaces for storing data to be protected;
(4) providing a one-time programmable memory in the controller module or the semiconductor memory medium module, and storing a unique serial number in the one-time programmable memory;
(5) configuring and storing a protected key in at least one storage space in the semiconductor memory device and/or the semiconductor memory medium module, wherein the protected key is acquired by a calculation based on the unique serial number;
(6) prior to an operation of data writing or reading, validating the protected key acquired by a calculation based on the unique serial number;
if the validation passes, proceeding to Steps (7a)˜(7c) or (8a)˜(8c);
(7a) determining if an operation is data writing;
if yes, proceeding to Step (7b);
(7b) protecting a data packet to be written with the unique serial number, or protecting the data packet with a data encryption key protected by the unique serial number;
(7c) storing the protected data packet in the semiconductor memory medium module;
(8a) determining if an operation is data reading;
if yes, proceeding to Step (8b);
(8b) unprotecting a data packet to be read with the unique serial number, or unprotecting the data packet to be read with a data encryption key protected by the unique serial number;
(8c) reading the unprotected data packet out of the semiconductor memory medium module.

12 more elements

Dependencies are inferred from the claim text.

Semiconductor memory device and method for realizing secure data storage

Life of this patent

Semiconductor memory device and method for realizing secure data storage

Life of this patent

Abstract

Claims12