Cryptographic communication method, encryption method, and cryptographic communication system
US6788788B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1999 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Sep 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/083
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A novel cryptographic communication system including ID-NIKS system with high security. Secret key generation functions and key sharing functions are not separable. Key sharing is also probabilistically possible. A center uses entity-specific random numbers and entity-specific public keys based on ID information for each entity to generate two types of secret key (vectors s and t) in which two numbers serve as the moduli, respectively. The center then sends these secret keys to each entity, and each entity uses these two types of its own entity-specific secret key sent from the center and disclosed public key of another entity (the entity who receives a ciphertext or sends a ciphertext) to generate a common key that is shared by two entities for use in the encrypting of a plaintext into a ciphertext and in the decrypting of a ciphertext into a plaintext.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.