| 摘要 |
<p>A method for establishing a secret key for a data transmission between communication partners in a network, in particular in a personal area network (PAN), or in a body area network (BAN), wherein one or several inefficient communication partners (B) in comparison to a strong, preferably central communication partner (A) of the network, have reduced power resources, is characterized through the following steps: the strong communication partner (A) transmits a plurality of data pairs, each comprising a possible key (K<SUB>j</SUB>) and an identification (ID<SUB>i</SUB>), to the weak communication partner (B) in a concealed manner, the weak communication partner (B) randomly selects a data pair from the plurality of data pairs, reveals the concealment of the data pair and sends the respective identification (ID<SUB>j</SUB>) back to the strong communication partner (A), the strong communication partner (A) reconstructs the associated key (K<SUB>j</SUB>) from the received identification (ID<SUB>j</SUB>), said key (K<SUB>j</SUB>) then being used as a secret key for the data transmission between the strong and the weak communication partner.</p> |
