Quantum-augmentable hybrid encryption system and method
US11431498B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 12, 2020 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | May 3, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3236
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A hybrid encryption scheme links a first public key encryption (PKE) scheme with a second PKE scheme through a true random or pseudo-random element, which is used by a sender to encapsulate a symmetrically encrypted message and its associated symmetric key to generate a pair of ciphertexts for transmission to a recipient. The recipient decrypts and decapsulates the ciphertexts, retrieves the random element, and may conduct one or more verification steps to ensure that the ciphertexts were well-formed, and to detect any re-encryption or encapsulation attacks. To encrypt a message, the message and initial random value are encrypted with a symmetric key to provide an intermediate ciphertext. The symmetric key and the encrypted message-value are each encapsulated by distinct algorithms using distinct values derived from the initial random value, such as different hashes, and public keys to provide first and second ciphertexts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.