Certificateless Multi-Party Authenticated Encryption Mitigating Ephemeral Key Leakage
Łukasz Krzywiecki, Hannes Salin, Mateusz Jachniak · 2021
We propose two secure modifications of a multi-party authenticated encryption scheme with aggregation, mitigating ephemeral leakage attacks on narrowband Internet of Things devices and sensor equipment, used in different type of connected infrastructures. Our schemes are provably secure in a stronger security model where a set of nodes in a 5G-based architecture can produce authenticated and encrypted signcryption messages, aggregated into one verifiable cipher text. We provide benchmarks from a proof of concept implementation, showing the feasibility of our solutions.