KeySpace: Enhancing Public Key Infrastructure for Interplanetary Networks
Joshua Smailes, Filip Futera, Sebastian K\"ohler, Simon Birnbach, Martin Strohmeier, Ivan Martinovic

TL;DR
This paper introduces KeySpace, a framework for evaluating PKI systems in interplanetary networks, demonstrating that existing protocols can be adapted for high-latency, interrupted environments and proposing improvements for efficiency and security.
Contribution
The paper develops a standardized testing framework for PKI in complex networks and demonstrates the effective adaptation of existing protocols like OCSP and CRLs for interplanetary communication.
Findings
OCSP and CRLs can be used effectively in interplanetary networks with high latency.
KeySpace enables fair comparison of PKI protocols across different network topologies.
Proposed techniques reduce overhead and improve security in PKI operations.
Abstract
As the use of satellites continues to grow, new networking paradigms are emerging to support the scale and long distance communication inherent to these networks. In particular, interplanetary communication relays connect distant network segments together, but result in a sparsely connected network with long-distance links that are frequently interrupted. In this new context, traditional Public Key Infrastructure (PKI) becomes difficult to implement, due to the impossibility of low-latency queries to a central authority. This paper addresses the challenge of implementing PKI in these complex networks, identifying the essential goals and requirements. Using these requirements, we develop the KeySpace framework, comprising a set of standardized experiments and metrics for comparing PKI systems across various network topologies, evaluating their performance and security. This enables the…
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Taxonomy
TopicsOpportunistic and Delay-Tolerant Networks · Space Science and Extraterrestrial Life · Space exploration and regulation
