| 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 (Kj) and an identification (IDi), 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 (IDj) back to the strong communication partner (A), the strong communication partner (A) reconstructs the associated key (Kj) from the received identification (IDj), said key (Kj) then being used as a secret key for the data transmission between the strong and the weak communication partner.</p> |
