De-duplication of Encrypted Data

Zheng Yan (Inventor)

Research output: Patent

Abstract

According to an example aspect of the invention, there is provided an apparatus comprising at least one processing core and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to receive, from a first user, a ciphertext, a first hash value and a first ciphered encryption key, receive, from a second user, a second hash value, responsive to a determination the first hash value is the same as the second hash value, obtain a re-encryption key, and apply the re-encryption key to the first ciphered encryption key to obtain a re-encrypted encryption key, the re-encrypted encryption key being decryptable with a secret key of the second user.

Original languageEnglish
Patent numberUS10897362
IPCH04L 9/ 30 A I
Priority date18/12/2014
Publication statusPublished - 19 Jan 2021
MoE publication typeH1 Granted patent

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