公开(公告)号：US20240311145A1

公开(公告)日：2024-09-19

申请号：US18596194

申请日：2024-03-05

申请人： SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION ,  RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY

发明人： Yunheung PAEK ,  Hyungjoon KOO ,  Sunwoo AHN ,  Seonggwan AHN

IPC分类号： G06F8/75

CPC分类号： G06F8/751

摘要： A binary code similarity detection device performs a preprocessing operation of generating an assembly expression for the binary code by converting a machine language of an input binary code into an assembly language, extracting an assembly function or a command from the binary code converted to the assembly language, and detects a similarity to the assembly expression of a pre-stored binary code by inputting the assembly expression generated by the preprocessing operation to a trained model based on bidirectional encoder representations from transformers (BERT), and the trained model is generated by performing a pre-training step of causing the assembly expression to be understood and a fine-tuning step of inputting an assembly expression of a first binary code and an assembly expression of a second binary code to a pre-trained model and then fine-tuning the pre-trained model based on a similarity between the first binary code and the second binary code.

公开(公告)号：US20240095316A1

公开(公告)日：2024-03-21

申请号：US18368734

申请日：2023-09-15

申请人： Research & Business Foundation SUNGKYUNKWAN UNIVERSITY

发明人： Hyoungshick KIM ,  Taeyoung KIM ,  Yunhee JANG ,  Chanjong LEE ,  Hyungjoon KOO

IPC分类号： G06F21/16 ,  G06F8/41 ,  G06F21/12

CPC分类号： G06F21/16 ,  G06F8/433 ,  G06F21/125 ,  G06Q30/0283

摘要： A watermarking method for smart contract according to an embodiment of the present disclosure comprises compiling a source code of a smart contract to create a contract creation bytecode and a runtime bytecode; generating a control flow graph including a plurality of byte regions based on the runtime bytecode; setting opcode groups by grouping consecutive opcodes in an opcode list in the plurality of byte regions of the generated control flow graph so that a sum of gas costs for the consecutive opcodes is greater than or equal to a preset gas cost value; extracting a watermarkable byte region based on the set opcode groups; determining watermarking bytes, in which a watermark is to be embed in the watermarkable byte region, to embed the watermark and storing location information of the determined watermarking bytes; hashing fingerprint information including information on the watermark and the location information of the watermarking bytes to create a fingerprint; and embedding the created fingerprint in the contract creation bytecode to deploy the smart contract. Hence, the watermark can be embedded without an additional executable code and a gas fee in a smart contract program.