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All Journal Annual Research Seminar Jurnal Ampere JETT (Jurnal Elektro dan Telekomunikasi Terapan) Tech-E JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING Indonesian Journal of Artificial Intelligence and Data Mining JOURNAL OF APPLIED INFORMATICS AND COMPUTING JURNAL TEKNIK INFORMATIKA DAN SISTEM INFORMASI Jurnal E-Komtek ITEJ (Information Technology Engineering Journals)
Sopian Soim
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering

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Analysis of 5G Standalone Security Against Man-in-the-Middle Attacks Using Sequence Number Desynchronization An Nisa; Sopian soim; Lindawati
JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING Vol. 10 No. 1 (2026): Issues July 2026
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jite.v10i1.18198

Abstract

The architecture of standalone 5G networks offers improved communication performance, but its authentication procedures remain vulnerable to eavesdropping threats. This research evaluates the system’s vulnerability to Man-in-the-Middle attacks and proposes comprehensive mitigation methods to address these security issues. Relying on Open5GS as the core network and UERANSIM as a simulator for base stations and user devices, testing was conducted in a virtualized environment. The methods used include traffic manipulation at the N2 interface to trigger desynchronization of the sequence number in the 5G-AKA authentication procedure. Experimental results show that packet interception successfully caused sequence number desynchronization, which directly led to authentication failure and device isolation due to Denial of Service. Additionally, network monitoring revealed that the HTTP/2 protocol displays customer data in plain text. In conclusion, Secure Socket Layer (SSL) encryption has proven effective as a mitigation method. With this integration, internal communication channels have been converted to a fully encrypted HTTPS format, preventing eavesdropping attempts. Furthermore, customer cryptographic parameters remain protected while keeping the operational overhead below acceptable limits.
Co-Authors Ade Silvia Handayani Al Fatur Sayid An Nisa Annisa Arrumaisha Siregar aryanti aryanti Aryanti Aryanti Bahri Joni Defina Apriliani Faisal Damsi Hani Marta Putri Husni, Nyayu Latifah Junaidi Junaidi LINDAWATI M. Ilham Akbar Meilisya Eka Saputri Mohammad Fadhli Monica Pasu Aprilia Simarmata Msy Aulia Hasanah Noviansyah, Noer Ramadhon Permatasari, Rosmalinda Rumiasih Rumiasih Safitri, Rahmi Dian Sholihin Sholihin