Telecommunication system, for example an IP telecommunication system, and equipment units for use in the system
First Claim
1. A telecommunication system including a plurality of terminals divided into groups and connected to a first telecommunication network, such that within a first group each terminal of said first group is configured to send multidestination messages to other terminals of said first group, wherein each terminal of said first group is associated with an encryption and decryption device so that each terminals of said first group is configured to send multidestination messages via the first telecommunication network that can only be decrypted by the other terminals of said first group,wherein said plurality of terminals are connected to a terrestrial cable network and are configured to supply messages received from said first telecommunication network and decrypted by the respective encryption and decryption device to said cable network, and further configured to supply messages received from said cable network and encrypted by the respective encryption and decryption device to said first telecommunication network, andthe system further including a central server configured to distribute encryption and decryption keys to each encryption and decryption device for secure transmission of communications within each group.
10 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a telecommunication system including a plurality of terminals divided into groups such that within each group each terminal can send multidestination messages to the other members of the group. Each terminal of a group is associated with encryption and decryption means so that each terminal can send multidestination messages that can be decrypted only by the other terminals of the group. The system includes a central server for distributing to each encryption and decryption means keys for secure transmission of communications within each group.
13 Citations
35 Claims
-
1. A telecommunication system including a plurality of terminals divided into groups and connected to a first telecommunication network, such that within a first group each terminal of said first group is configured to send multidestination messages to other terminals of said first group, wherein each terminal of said first group is associated with an encryption and decryption device so that each terminals of said first group is configured to send multidestination messages via the first telecommunication network that can only be decrypted by the other terminals of said first group,
wherein said plurality of terminals are connected to a terrestrial cable network and are configured to supply messages received from said first telecommunication network and decrypted by the respective encryption and decryption device to said cable network, and further configured to supply messages received from said cable network and encrypted by the respective encryption and decryption device to said first telecommunication network, and the system further including a central server configured to distribute encryption and decryption keys to each encryption and decryption device for secure transmission of communications within each group.
-
27. An encryption and decryption device associated with a first terminal among a plurality of terminals, the encryption and decryption device including:
-
an interface connected to a first telecommunication network, configured to receive and send encrypted messages between the first terminal and at least a second terminal from among the plurality of terminals via said first telecommunication network, an interface connected to a second network, configured to receive messages sent from at least said second terminal, via said second network, wherein messages are to be encrypted by said encryption and decryption device and transmitted by the first telecommunication network to the first terminal, and to deliver to at least said second terminal via the second network, messages received from the first terminal via said first telecommunication network that have been decrypted by said encryption and decryption device, and an interface configured to receive encryption and decryption keys from a server, said encryption keys being used to encrypt a multidestination message to selected addressees forming part of the same group as said first terminal with which said encryption and decryption device is associated. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
-
Specification