Method for the encryption of data transfer
US5987137A · kind A · utility
30Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Jun 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The object of the invention is a method for the encryption of information transferred between data transfer devices (MS, SGSN) in a data communication system wherein one or more data frames are created from one or more data packets formed from the information by the application. The data frames comprise at least a header field and a data field. In the method, at least some part of the data packets is ciphered by using a ciphering key (Kc). To the data frames, synchronization data (COUNT) is attached, the value of which is changed at least at the transmission of each data frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.