TY - GEN A1 - Hiller, Jens A1 - Henze, Martin A1 - Zimmermann, Torsten A1 - Hohlfeld, Oliver A1 - Wehrle, Klaus T1 - The Case for Session Sharing: Relieving Clients from TLS Handshake Overheads T2 - 2019 IEEE 44th LCN Symposium on Emerging Topics in Networking (LCN Symposium), 14-17 Oct. 2019, Osnabrück, Germany N2 - In recent years, the amount of traffic protected with Transport Layer Security (TLS) has significantly increased and new protocols such as HTTP/2 and QUIC further foster this emerging trend. However, protecting traffic with TLS has significant impacts on network entities. While the restrictions for middleboxes have been extensively studied, addressing the impact of TLS on clients and servers has been mostly neglected so far. Especially mobile clients in emerging 5G and IoT deployments suffer from significantly increased latency, traffic, and energy overheads when protecting traffic with TLS. In this paper, we address this emerging topic by thoroughly analyzing the impact of TLS on clients and servers and derive opportunities for significantly decreasing latency of TLS communication and downsizing TLS management traffic, thereby also reducing TLSinduced server load. We propose a protocol compatible redesign of TLS session management to use these opportunities and showcase their potential based on mobile device traffic and mobile web-browsing traces. These show promising potentials for latency improvements by up to 25.8% and energy savings of up to 26.3%. KW - TLS Performance, Efficient Secure Communication, TLS Session Resumption, Network Security, Security and Privacy, Mobile Networking, 5G and IoT Y1 - 2019 UR - https://ieeexplore.ieee.org/document/9000667 SN - 978-1-7281-2561-9 SN - 978-1-7281-2562-6 U6 - https://doi.org/10.1109/LCNSymposium47956.2019.9000667 PB - IEEE ER -