TY - GEN
T1 - Quantum-resistant End-to-End Secure Messaging and Email Communication
AU - Döberl, Christoph
AU - Eibner, Wolfgang
AU - Gärtner, Simon
AU - Kos, Manuela
AU - Kutschera, Florian
A2 - Ramacher, Sebastian
PY - 2023/8/29
Y1 - 2023/8/29
N2 - With recent advances on the capabilities of quantum computers and the seminal work by Shor on the prime factorization of integers with quantum algorithms, the threat of quantum computers is looming over public-key based cryptographic systems. Two distinct areas of research - post-quantum and quantum cryptography - provide the technical means to secure cryptographic systems against potentially powerful enough quantum computers. As both technologies are now becoming readily available, integration in a wide range of applications to understand their characteristics and trade-offs and the associated evaluation is of importance. In this work, we investigate the integration of quantum-resistant cryptography into secure messaging applications. Specifically, we target Delta Chat which is an end-to-end secure and open source messaging application. We integrate both post-quantum secure digital signature schemes and public-key encryption schemes to keep the end-to-end secure messaging properties of the system, whereas the server-to-server communication is additionally secured via secret keys provided by a metropolitan quantum key distribution network. Since Delta Chat transports messages via the users' email accounts, we thus also obtain a quantum-resistant email infrastructure. As such we also analyze mechanisms commonly employed to secure email communication and the required implementation steps to ensure quantum-system for users of S/MIME and OpenPGP.
AB - With recent advances on the capabilities of quantum computers and the seminal work by Shor on the prime factorization of integers with quantum algorithms, the threat of quantum computers is looming over public-key based cryptographic systems. Two distinct areas of research - post-quantum and quantum cryptography - provide the technical means to secure cryptographic systems against potentially powerful enough quantum computers. As both technologies are now becoming readily available, integration in a wide range of applications to understand their characteristics and trade-offs and the associated evaluation is of importance. In this work, we investigate the integration of quantum-resistant cryptography into secure messaging applications. Specifically, we target Delta Chat which is an end-to-end secure and open source messaging application. We integrate both post-quantum secure digital signature schemes and public-key encryption schemes to keep the end-to-end secure messaging properties of the system, whereas the server-to-server communication is additionally secured via secret keys provided by a metropolitan quantum key distribution network. Since Delta Chat transports messages via the users' email accounts, we thus also obtain a quantum-resistant email infrastructure. As such we also analyze mechanisms commonly employed to secure email communication and the required implementation steps to ensure quantum-system for users of S/MIME and OpenPGP.
UR - https://www.mendeley.com/catalogue/74467029-85e0-3759-8f23-6a4edcdfabda/
U2 - 10.1145/3600160.3605049
DO - 10.1145/3600160.3605049
M3 - Conference Proceedings with Oral Presentation
SN - 9798400707728
T3 - ACM International Conference Proceeding Series
SP - 1
EP - 8
BT - ARES '23: Proceedings of the 18th International Conference on Availability, Reliability and Security
T2 - ARES 2023: The 18th International Conference on Availability, Reliability and Security
Y2 - 29 August 2023 through 1 September 2023
ER -