Patent ID: 9571277
Date: 2017-02-14
CPC Classifications: H04L

Claim:
1. A method for generating a key in a network, the network including, in a secured network part, at least one first user and one second user having a secured communication link to one another and including a third user, to which the secured communication link is to be one of established and renewed, the method comprising: causing the first user and the third user to each generate a first partial value sequence from a property of a transmission channel between the first user and the third user; causing the second user and the third user to each generate a second partial value sequence from a property of a transmission channel between the second user and the third user; ascertaining, in the secured network part of the network, the key on the basis of at least the first partial value sequence of the first user and the second partial value sequence of the second user; and generating the key in the third user from at least the first partial value sequence and the second partial value sequence, wherein the second user transmits the second partial value sequence to the first user, and wherein the first user generates the key from at least the first partial value sequence and the second partial value sequence, wherein the first user additionally transmits the first partial value sequence to the second user, and wherein the second user generates the key from at least the first partial value sequence and the second partial value sequence, and wherein the first and second partial value sequences are bit sequences determined by information calibration.