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Anca Jurcut

Publications and source records attributed to Anca Jurcut.

2 recordsLinked to original sources
arXiv2026

QUIC-TRIP: A Triple-Redundant Journey Toward Secure Substation Communications

Modern power systems rely on real-time substation communication protocols, such as the Routable Generic Object-Oriented Substation Event (R-GOOSE), for critical control and protection functions. However, these protocols often lack built-in security features and prioritize availability over confidentiality and integrity, making them susceptible to false data injection and denial-of-service attacks. This vulnerability is exacerbated when communications are transmitted over wide-area or public networks. Addressing these cyber threats is essential to comply with current security mandates, including the DOE's defense-in-depth and zero-trust guidelines. This paper introduces QUIC-TRIP, a transparent security methodology for low-latency IP-based industrial communications. By operating at the Open Systems Interconnection (OSI) Transport Layer (Layer 4), the solution encapsulates and protects data flows without affecting the operation of existing protocol endpoints. Baseline echo Round-Trip Time (RTT) results over a Frankfurt-Amsterdam communication path show that the underlying transport-layer proxy used by QUIC-TRIP achieves a lower average RTT than OpenVPN and only 2.88% higher average RTT than integrated DTLS 1.2, even with DTLS session reuse. We evaluate the resilience of QUIC-TRIP multipath communication under DoS flooding by securing R-GOOSE communications. In these tests, traffic is transparently delivered through three different paths, and QUIC-TRIP forwards the earliest-arriving duplicate while discarding later copies. The framework provides a triple-redundant defense scheme with a measured communication overhead of 32.18% per enabled proxied path, offering a bounded trade-off between resilience and bandwidth cost for time-critical grid operations.

cs.CR↗
arXiv2021

Detection and Prevention of New Attacks for ID-based Authentication Protocols

The rapid development of information and network technologies motivates the emergence of various new computing paradigms, such as distributed computing, and edge computing. This also enables more and more network enterprises to provide multiple different services simultaneously. To ensure these services can conveniently be accessed only by authorized users, many password and smart card-based authentication schemes for multi-server architecture have been proposed. In this paper, we review several dynamic ID-based password authentication schemes for multi-server environments. New attacks against four of these schemes are presented, demonstrating that an adversary can impersonate either legitimate or fictitious users. The impact of these attacks is the failure to achieve the main security requirement: authentication. Thus, the security of the analyzed schemes is proven to be compromised. We analyze these four dynamic ID-based schemes and discuss the reasons for the success of the new attacks. Additionally, we propose a new set of design guidelines to prevent such exploitable weaknesses on dynamic ID-based authentication protocols. Finally, we apply the proposed guidelines to the analyzed protocols and demonstrate that violation of these guidelines leads to insecure protocols.

cs.CR↗