U.S. Patent 10791143 was awarded to Alibaba Group Holding Limited on September 29, 2020 and is entitled “Anti-replay device based on memory space interchange.” The first named inventor is Hong Lv of Hangzhou, . The abstract contains an overview of the patent disclosure:

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for detecting and disabling replay attacks. One of the methods includes receiving a transaction to be completed in a blockchain. A current working section of memory storing transaction information that is designated for use in identifying past transactions already processed is determined, where the memory also stores a backup section providing, when used in combination with the current working section, an alternating memory section storage scheme for the transaction information. From the current working section, whether the transaction has previously been processed is determined. When it is determined that the transaction has previously been processed, the transaction is bypassed. When it is determined that the transaction has not previously been processed the transaction is processed and transaction information for the transaction is written into the current working section. Link to Full Patent

This blockchain patent was originally filed on December 13, 2019  as U.S. Patent Application 16/713409 at the United Stated Patent and Trademark Office. The application was them awarded a patent grant and published as U.S. Patent 10791143. The primary examiner was Don G Zhao.

Alibaba Group Holding Limited, who is the original assignee of this patent, has at least 1834 total granted patents in the United States as of the date of this article. This blockchain patent has been cited 0 times by other U.S. patents according to our law firm research, and can be considered an innovative patent in the field of cryptocurrency and blockchain.

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