PATENT CLAIM ANALYSIS

Application Number: 15759569
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-05
Patent Classification: ["713", "193000"]

Abstract:
A method of data decryption for the physical image of a flash memory chip includes the following steps: 001—Zero-filling the logical data of a USB flash drive to obtain the physical data, removing the management bytes in the physical data to obtain a key; 002—Dividing area for the key according to the structure of the flash memory chip to obtain the algorithm of the main control key. The way of data storage is discovered through multiple experiments: The data stored on the chip is the data generated from the XOR operation on the logical data with the key from encryption algorithm. All the keys generated by the main control are obtained through zero-filling of the logical data, and their encryption method can be obtained through simple analysis on all the keys. The data extracted from the flash memory chip when the USB flash drive is damaged will be readable.

Claim (Index 5):
A method of data decryption for the physical image of a flash memory chip according to  claim 1 , wherein the main control model of said USB flash drive is SSS6691, said flash memory model is TC58NVG5D2FTAIO, and said page size is 8832 bytes, with a 4G flash memory chip comprising 256 blocks.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 90.0
- Lexical Diversity: 2.19444
- Patent Class: 713.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12345921', '13595476', '13335930', '12584299', '12767985']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3457681951016065
- 35 USC 102 Novelty (BERT): 0.4894352763047557
- Combined Prediction Score: 0.3601349032219214
- Mean Citation Score: 179.20833999999996
- Max Citation Score: 186.30632
- Similarity Product: 132.724326111784

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test