Method of processing a ciphertext, apparatus, and storage medium
US10171459B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Oct 3, 2016 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Mar 17, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3231
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of processing a ciphertext, the method includes: acquiring a part of a plurality of encrypted elements included in the ciphertext, each of the plurality of encrypted elements being an encrypted element in which values of a plurality of elements in a multidimensional determination target vector are respectively encrypted by homomorphic encryption; decrypting the acquired part of the plurality of encrypted elements; and determining validity of the determination target vector based on a relationship between at least one value obtained by the decrypting and both of 0 and 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.