Title:
SECURE STORAGE METHOD BASED ON DOMESTIC CRYPTOGRAPHY CHIP
Document Type and Number:
WIPO Patent Application WO/2020/151194
Kind Code:
A1
Abstract:
A secure storage method based on a domestic cryptography chip. The method comprises: dividing LBA data into a plurality of blocks, and configuring different keys for different blocks to perform encryption and decryption; performing an exclusive OR operation on one key and a domestic cryptography chip ID to generate a new key, performing an exclusive OR operation on the new key and an LBA of the current block to generate encryption and decryption keys for different blocks, and then calculating a Hash result of the new key by means of an SM3 algorithm to generate data of a fixed length, wherein the data is a final encryption and decryption key of the block; and performing key extension and data transmission in parallel. A storage block key is generated each time same is used, and is not stored inside a chip, and even if a certain key is cracked, full-disk data cannot be parsed, thereby greatly enhancing the difficulty of cracking the full-disk data, and enhancing the security of the key and the data.
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Inventors:
SUN YUXI (CN)
QIN FALIN (CN)
YANG XINGKANG (CN)
WANG XIAOYU (CN)
YIN XIANGYAN (CN)
QIN FALIN (CN)
YANG XINGKANG (CN)
WANG XIAOYU (CN)
YIN XIANGYAN (CN)
Application Number:
PCT/CN2019/094188
Publication Date:
July 30, 2020
Filing Date:
July 01, 2019
Export Citation:
Assignee:
SHANDONG SINOCHIP SEMICONDUCTOR CO LTD (CN)
International Classes:
G06F21/79
Foreign References:
| CN109840434A | 2019-06-04 | |||
| CN105426786A | 2016-03-23 | |||
| CN107516047A | 2017-12-26 | |||
| US20160335208A1 | 2016-11-17 |
Attorney, Agent or Firm:
JINAN SPRINGS PATENT&TRADEMARK OFFICE (CN)
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