DGIST Scholar: Satellite System Design for Communication Security and Network Control

Department of Electrical Engineering and Computer Science Theses Ph.D.

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Satellite System Design for Communication Security and Network Control

Title: Satellite System Design for Communication Security and Network Control

Author(s): Suhyeon Jeon

DGIST Authors: Suhyeon Jeon ; Jeongho Kwak ; Jihwan P. Choi

Advisor: 곽정호

Co-Advisor(s): Jihwan P. Choi

Issued Date: 2024

Awarded Date: 2024-02-01

Type: Thesis

Description: Multibeam Satellites;cryptography;physical layer security;transmission;handover

Table Of Contents: 1 Introduction 1
1.1 Non-Terrestrial Network 1
1.2 Motivation 2
1.3 Contributions 3
1.4 Outline . 5
2 Cross Layer Encryption of CFB-AES-TURBO for Advanced Data Transmission Security 6
2.1 Introduction . 6
2.2 Related Work 12
2.3 Proposed Joint Security Method 14
2.3.1 Encryption and Encoding . 14
2.3.2 Decoding and Decryption . 16
2.3.3 Encryption Block Size Selection . 18
2.3.4 Key Exchange 20
2.4 Performance Analysis 23
2.4.1 Processing Time and Complexity 23
2.4.2 BER performance 26
2.4.3 Security Performance . 31
2.4.4 Indistinguishability 34
2.4.5 Latency 37
2.5 Summary 40
3 Integrated Satellite Network Security 42
3.1 Introduction . 42
3.2 Modeling 48
3.2.1 Eavesdropping Risk 49
3.2.2 Security Signal Structure 52
3.2.3 Onboard Power Modeling and Gaussian Beamforming . 54
3.3 Integrated Encryption and Gaussian Beamforming Framework 56
3.3.1 Formulation 56
3.3.2 Orthogonal Multiple Access 57
3.3.3 Non-Orthogonal Multiple Access 59
3.4 Integrated Cryptography and Physical Layer Security Framework . 63
3.4.1 Formulation 63
3.4.2 Onboard Power Allocation for Signal Transmissions and Security Computations 66
3.4.3 Joint Beam Scheduling and Signal Assignment 69
3.4.4 Security Algorithm Selection 72
3.5 Performance Evaluation 72
3.5.1 Secure Transmission Capacity 72
3.5.2 Computational Complexity . 76
3.6 Simulation Result . 77
3.7 Summary 80
4 Dynamic Downlink Transmission and ISL Handover Control 82
4.1 Introduction . 82
4.2 System Model and Problem Formulation 85
4.3 Dynamic Transmission and Handover Control 90
4.3.1 Lyapunov Optimization 90
4.3.2 Auxiliary Variable 93
4.3.3 Admission Control 93
4.3.4 Joint Scheduling and Power Allocation 94
4.4 Simulation Result . 97
4.5 Summary 100
5 Conclusion 102
6 Appendix 104
6.1 Probability Density Function (PDF) of the Product of the Squared Nakagami-m Fading and Gaussian Beam Pattern in Section 3.2.1 104
6.1.1 PDF . 104
6.1.2 Mean and Variance 105
6.2 Channel Capacity of the Encryption Signal in 3.3.1 106
6.3 Upper Bound of the DMU in 4.3.1 . 108
References 110