Method, apparatus, and computer-readable medium for searching polymorphically encrypted data
US11716191B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2021 |
| Grant date | Aug 1, 2023 |
| Priority date | — |
| Expiry date | Feb 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3213
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus, and computer-readable medium for searching polymorphically encrypted data includes storing one or more pseudonymous tokens in a data store, the one or more pseudonymous tokens being generated by encrypting a ciphertext using a first algorithm and an encryption key, the first algorithm comprising a polymorphic algorithm configured to generate a distinct pseudonymous token for each application of the polymorphic algorithm to the same plaintext, and identifying data in the data store that corresponds to the ciphertext by querying the data store using a search token generated by encrypting the plaintext using a second algorithm and the encryption key, the search token being distinct from the one or more pseudonymous tokens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.