TITLE:
Transmission over Cognitive Radio Channel with Novel Secure LT Code
AUTHORS:
Elham Hosseini, Abolfazl Falahati
KEYWORDS:
Cognitive Radio; Symmetric Cryptographic Key Generation; LT Code
JOURNAL NAME:
Communications and Network,
Vol.5 No.3,
August
2,
2013
ABSTRACT: With the increasing of communication
applications in recent years, the demand for radio spectral resources has increased
significantly. Cognitive radio scenario was proposed to improve spectrum
efficiency in wireless communication systems. In cognitive radio network, it is
essential that control information is sent securely and reliably. Ensuring the
trustworthiness of the transmitting of spectrum sensing information is important
in the CR networks since spectrum sensing directly affects spectrum management
and incumbent coexistence. In this paper, the first secondary link channel
model is presented, then a secure LT Code is proposed to be compatible with
presented channel model and acquires good QoS. As we may know, LT code
overcomes packet loss when the channel of the SU is reclaimed by PU. In the new
proposed combined encoding and ciphered block, a LT code matrix is used to
generate a symmetric cryptographic key. Thus, less complexity observed in the
processing computation. Besides, cryptographic key is not sent over the
channel. As a result, an attacker has no way to eavesdrop the key unless he
is prepared to consider all possible key combinations. This replaced block
supplies secure controlling channel and increases spectrum efficiency too.