Soderi, Mucchi, Hämäläinen, Piva, and Iinatti
138
Any mechanism used to increment the γ M to the legitimate 5G user, yields to the
positive effect to increase the secure region, as shown in Figure 6.16. On the other hand,
when M
E , the security area becomes increasingly smaller up to disappearing. In
such case, Alice and Bob cannot implement any secure communication.
The WBPLSec can be successfully applied in those scenarios where mobile devices are
equipped with several air interfaces. A definite upward trend in the number of air
interfaces for each terminal has two defined possible approaches. At first, multi‐modality
uses different chip solutions to implement air interfaces diversity. On the other hand,
flexible air interfaces implemented via software defined radio (SDR) enables the
opportunistic use of spectrum [12,23]. SDR is expected to play an important role of 5G
networks, in which those air interfaces are applied to new architectures. The authors
plan to leverage security and propose to use WBPLSec with SDR to support physical‐
layer security solution in 5G devices.
6.5 Conclusions
The authors propose a technique, which is acting at the physical layer level, and not in
higher layers, like the symmetric encryption protocol does. Basically, the goal is to
improve the communication system compared to those with crypto‐protocols, in the
same way as any other techniques that can fall into the definition of physical‐layer
security. Physical layer security can be used together with and not in competition with
the conventional cryptographic protocols. In the 5G of mobile networks, in which
security shall be built into the system architecture, it is important to develop new
−15
−10
−5
0
5
10
15
20
25
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Distance [m]
P
out
NEAR−FIELD
REGION
AROUND ALICE
Effect of γ M on the P out of C s
γ M < γ E , No Security Area
γ M > γ E , Security Area Wider
NEAR−FIELD REGION
AROUND BOB
Figure 6.16 Increment of the γ M and its effect on the secure region size.
138
Any mechanism used to increment the γ M to the legitimate 5G user, yields to the
positive effect to increase the secure region, as shown in Figure 6.16. On the other hand,
when M
E , the security area becomes increasingly smaller up to disappearing. In
such case, Alice and Bob cannot implement any secure communication.
The WBPLSec can be successfully applied in those scenarios where mobile devices are
equipped with several air interfaces. A definite upward trend in the number of air
interfaces for each terminal has two defined possible approaches. At first, multi‐modality
uses different chip solutions to implement air interfaces diversity. On the other hand,
flexible air interfaces implemented via software defined radio (SDR) enables the
opportunistic use of spectrum [12,23]. SDR is expected to play an important role of 5G
networks, in which those air interfaces are applied to new architectures. The authors
plan to leverage security and propose to use WBPLSec with SDR to support physical‐
layer security solution in 5G devices.
6.5 Conclusions
The authors propose a technique, which is acting at the physical layer level, and not in
higher layers, like the symmetric encryption protocol does. Basically, the goal is to
improve the communication system compared to those with crypto‐protocols, in the
same way as any other techniques that can fall into the definition of physical‐layer
security. Physical layer security can be used together with and not in competition with
the conventional cryptographic protocols. In the 5G of mobile networks, in which
security shall be built into the system architecture, it is important to develop new
−15
−10
−5
0
5
10
15
20
25
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Distance [m]
P
out
NEAR−FIELD
REGION
AROUND ALICE
Effect of γ M on the P out of C s
γ M < γ E , No Security Area
γ M > γ E , Security Area Wider
NEAR−FIELD REGION
AROUND BOB
Figure 6.16 Increment of the γ M and its effect on the secure region size.