| US 7,477,743 B2 | ||
| Hybrid network encrypt/decrypt scheme | ||
| Tomi Hakkarainen, Nokia (Finland); and Rod Walsh, Tampere (Finland) | ||
| Assigned to Nokia Corporation, Espoo (Finland) | ||
| Filed on Feb. 07, 2002, as Appl. No. 10/72,147. | ||
| Prior Publication US 2003/0147532 A1, Aug. 07, 2003 | ||
| Int. Cl. H04L 9/00 (2006.01) | ||
| U.S. Cl. 380—239 [380/262; 380/281; 725/31] | 74 Claims |
| 1. A method, comprising:
receiving a request for a service from a requestor over a bi-directional channel;
authenticating the requestor;
transmitting first decryption information to the requestor over the bi-directional channel, wherein the first decryption information
decrypts the service;
transmitting the service, encrypted with encryption information corresponding to the first decryption information, over a
unidirectional channel;
generating second decryption information for use in decrypting the service;
encrypting the second decryption information with the encryption information corresponding to the first decryption information;
transmitting the second decryption information, encrypted with the encryption information corresponding to the first decryption
information, over the unidirectional channel, wherein the second decryption information decrypts the service; and
transmitting the service, encrypted with encryption information corresponding to the second decryption information rather
than with encryption information corresponding to the first decryption information, over the unidirectional channel.
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