Apparatus and method for certifying the delivery of information
US5475753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus by which the recipient of several pieces of newly released information can automatically verify its accurate delivery is disclosed. The first step in the method is to generate a certificate, for example, a checksum, for each of the pieces of information. The certificates are combined, for example, using an exclusive OR function to form elements of a release vector such that each certificate is used to generate multiple ones of the release vector elements. The release vector and a program are then delivered to the recipient by one medium while the pieces of information are delivered by another medium. The program is used at the recipient's location to generate a current vector using the same methods that were used to generate the release vector. Next, the current vector is compared to the release vector and the result is used to identify missing or corrupted pieces of the delivered information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.