METHOD FOR TRANSMITTING DATA BETWEEN NETWORK NODES

摘要

The invention relates to a method for transmitting data between network nodes (2) of a network (1) in a cryptographically protected manner. The network nodes (2) are, for example, sensor nodes of a wireless sensor network. In the method according to the invention, in order to transmit the data in a message (F), a NONCE value (N) is created from a count value (CTR) which is updated in the transmission of the message (F) and from a constant value (EANCV) which is provided in a shared manner to the network nodes (2) of the network (1). The data transmitted in the message (F) is then encrypted and decrypted within the network nodes (2) by means of a cryptographic key (K) and the created NONCE value (N). The method according to the invention offers in particular protection against replay attacks while at the same time minimizing the use of resources of the network nodes (2).