Applied quantum cryptography: beyond end-to-end encryption

Christian Kollmitzer, Mario Pivk

Kyuseok Shim, B.H. Kim, Wonhyuk Lee

Currently, data security is one of the most concerning research topics. The traditional RSA encryption system has become vulnerable to quantum algorithms such as Grover and Shor, leading to the development of new security systems for the quantum. As a result, quantum cryptography is gaining importance as a key element of future communication security. This study focuses on quantum key distribution protocols for data quantum encryption, aiming to achieve quantum robustness in all stages of quantum cryptography communication processes. Quantum cryptography communication requires robust quantum encryption not only between end-nodes but also between all components. Therefore, this study demonstrates the process of end-to-end data quantum encryption and proves the overall quantum robustness in this process.

A. S. Anakath, S. Ambika

A governmental and business organizations employ handheld devices like palmtops and smart cellular phones for communication, collaboration, and purchases, the problem of privacy and security arise. Essential encryption systems present themselves as a problem to the current nature of mobility since most of the previous encryption methods evolved with the centralized systems. Quantum cryptography can thus be regarded as a perfect solution to the above challenges given the fact that it employs principles of quantum mechanics such as quantum key distribution (QKD) to secure communications in mobile platforms. This paper aims at examining the use of quantum cryptography in mobile computing systems whereby an endeavor is made to determine how quantum communication algorithms can be incorporated into the current mobile communication standards. The efficiency of the quantum cryptography is also discussed in the context of protection from threats that are characteristic for the mobile networks, such as wiretapping and data theft. Also, we touch on such issues as how practical, easily scalable, and suitable for mobile systems quantum cryptography is in terms of computational and network burden. Thus, in this paper, the author would like to show that by applying quantum cryptography, end-to-end privacy can be effectively achieved in the field of mobile computing and explain its significance for the development of next generations of mobile security.

Charles H. Bennett, Gilles Brassard A

Yeongjae Park, Hyeondo Yoo, Jieun Ryu +3 more

Owing to the expansion of non-face-to-face activities, security issues in video conferencing systems are becoming more critical. In this paper, we focus on the end-to-end encryption (E2EE) function among security services of video conferencing systems. First, the E2EE-related protocols of Zoom and Secure Frame (SFrame), which are representative video conferencing systems, are thoroughly investigated, and the two systems are compared and analyzed overall. Next, the E2EE protocol in the Government Public Key Infrastructure (GPKI)-based video conferencing system, in which the user authentication mechanism is fundamentally different from those used in private sector systems, such as Zoom or SFrame, will be considered. In particular, among E2EE-related protocols, we propose a detailed mechanism in which the post-quantum cryptography (PQC) key encapsulation mechanism (KEM) is applied to the user key exchange process. As the session key is not disclosed to the central server even in futuristic quantum computers, the mechanism to which the PQC KEM method proposed in this study is applied satisfies the E2EE security requirements and can be applied to domestic GPKI-based systems. It is expected to contribute in strengthening the safety of the next-generation video conferencing system.