Method for the encryption of data transfer

Details Method for the encryption of data transfer Method for the encryption of data transfer

1997-06-04

1999-11-16

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

380 9, 380 29, 380 37, 380 43, 380 48, 380 49, H04L 928, H04L 906, H04L 900

Patent

active

059871377

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.

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patent: 5161193 (1992-11-01), Lampson et al.
patent: 5235644 (1993-08-01), Gupta et al.
patent: 5257257 (1993-10-01), Chen et al.
patent: 5319712 (1994-06-01), Finkelstein et al.
patent: 5455863 (1995-10-01), Brown et al.
patent: 5640395 (1997-06-01), Hamalainen et al.

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