System and method for securely adding redundancy to an electronic message
US7533331B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2005 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | May 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0083
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for adding a redundancy check to an electronic message to discourage tampering and facilitate identification of altered messages provides a communication device for composing message content, a messaging module with a formatting and encoding layer for encoding the message content with header information in a series of message blocks, and an encryption layer for calculating a redundancy check value and inserting the value in one or more locations within the series of message blocks according a rule defined by a characteristic of the message content or the header information, and encrypting the message for delivery to a recipient. Upon receipt, the recipient communication device decrypts the message, extracts the redundancy check value from the message, and compares a calculated redundancy check value with the extracted redundancy check value to determine if the message had been altered before receipt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.