Invention Grant
- Patent Title: Verifiable secret shuffle protocol for encrypted data based on homomorphic encryption and secret sharing
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Application No.: US16848966Application Date: 2020-04-15
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Publication No.: US11356241B2Publication Date: 2022-06-07
- Inventor: Kilian Becher , Axel Schroepfer , Mirko Schaefer
- Applicant: SAP SE
- Applicant Address: DE Walldorf
- Assignee: SAP SE
- Current Assignee: SAP SE
- Current Assignee Address: DE Walldorf
- Agency: Fish & Richardson P.C.
- Main IPC: H04L9/08
- IPC: H04L9/08 ; H04L9/00 ; H04L9/40 ; G06F7/58

Abstract:
The present disclosure involves systems, software, and computer implemented methods for a verifiable communication-efficient secret shuffle protocol for encrypted data based on homomorphic encryption. A service provider and multiple clients participate in a secret shuffle protocol of randomly shuffling encrypted client-specific secret input values. The protocol includes generation and exchange of random numbers, random permutations, different blinding values, and use of random secret-shares. A protocol step includes homomorphic operations to shuffle encrypted secret input values so that resulting encrypted secret input values are rerandomized and in a shuffled sequence that is unmapped to an order of receipt by the service provider of the encrypted secret input values.
Public/Granted literature
- US20210328762A1 VERIFIABLE SECRET SHUFFLE PROTOCOL FOR ENCRYPTED DATA BASED ON HOMOMORPHIC ENCRYPTION AND SECRET SHARING Public/Granted day:2021-10-21
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