NEC Assigned Patent
Re-keying encrypted data file
By Francis Pelletier | June 4, 2021 at 2:30 pmNEC Corp., Tokyo, Japan, has been assigned a patent (11,018,858) developed by Karame, Ghassan, Heidelberg, Germany, for a “method for re-keying an encrypted data file.“
The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A method for re-keying an encrypted data file, the data file being stored chunkwise on a storage entity, SE, data file chunks being encrypted with a global secret, and the method being performed in a memory available to a computing device, includes partially updating a global secret for encryption data for a data chunk to be re-keyed such that an output of a non-interactive oblivious key exchange is used to identify the private key of the data chunk to be re-keyed with a new private key, and reencrypting the data chunk to be re-keyed with the updated global secret.”
The patent application was filed on December 8, 2015 (Appl. No.15/781,706).
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