Transmission of encrypted messages between a transmitter and a receiver utilizing a one-time cryptographic pad
US7327845B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | May 9, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus and method is disclosed for establishing a one-time cryptographic pad between a communicating pair, a communicating pair comprising a pair of transmitter-receivers, each of the pair having a plurality of cryptographic devices in common. The communicating pair also store previously exchanged messages and transmissions, a transmission comprising secure data exchanged by the pair that is independent of message content. The first transmitter-receiver randomly selects a cryptographic device and a previous transmission or message that has been sent to the second transmitter-receiver. The first transmitter-receiver also randomly selects a reference to a message or transmission previously sent by the second transmitter-receiver. The first transmitter-receiver encrypts the previously sent transmission or message and the reference to the message or transmission previously sent by the second transmitter-receiver and sends to the second transmitter-receiver. The second transmitter-receiver discovers the encryption device used by the first transmitter-receiver, verifies the message or transmission sent by the first transmitter-receiver, and uses the decrypted reference to access th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.