Key updating method based on local information collaboration

Abstract

The invention relates to a key updating method based on local information collaboration, applied to the field of network information secrecy. The method does not need network synchronization, a credible center is formed by node cooperation and broadcasts a key updating material in part of channels, accept nodes carry out cooperation forwarding and the key updating efficiency of Ad hoc network in multi-channel is enhanced, therefore, the updating efficiency of the method is reduced to n from o(n), wherein n is number of frequency bands. For ensuring the security during updating, the invention provides a ring signature based on a threshold mechanism so as to protect the anonymity of a trusted third party. The technical scheme can effectively resist attack of malicious nodes to key updating process.

Description

technical field The invention relates to the fields of multi-channel Ad hoc key management and security design, and in particular provides a distributed key update scheme without a trusted center based on local information coordination. Background technique Ad hoc networks can work in multiple frequency bands through cognitive radio technology, and free use of unlicensed frequency bands without interfering with registered users effectively improves the shortage of spectrum resources. Through the cognitive engine, wireless nodes can establish connections under different devices, environments, policies and frequency bands, providing a self-organizing, distributed, flexible and intelligent communication method. Since the existing traditional wireless network protocols are based on fixed spectrum, they are not suitable for multi-channel Ad hoc networks, so it is necessary to design safe, reliable and efficient multi-channel Ad hoc network protocols. With the development of this...

AI Technical Summary

Problems solved by technology

This method does not require the channel negotiation process, nor does it need the support of the control channel. The time delay spent by the trusted third party on spectrum switching is limited. Interference ensures the flexibility of the node. Since some channels are randomly selected, the possibility of being attacked by a saturated channel is reduced. At the same time, even if an attack occurs, the key update process cannot be prevented.

Images