Patent ID: 7869445
Filing Date: 2011-01-11
Classification: H04L

Abstract:
1. A method of transmitting data in a communication system, the communication system including a source node that generates the data and a plurality of general nodes, each being a destination node for the data or a relay node for relaying the data, the source node being linked with each of the general nodes by at least one independent path, the data being encoded by using an encoding matrix at the source node and the relay node, the method comprising: determining a general node from among the general nodes that has maximum number of independent paths up to the source node, the maximum number of independent paths being a largest number of independent paths which exist for any of the general nodes; setting a size of a set formed by elements of the encoding matrix; calculating a tap-proof index that indicates security level against tapping of the data flowing in the communication system based on the maximum number of independent paths and the size of the set; and controlling the tap-proof index.