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arXiv 2510.07620cs.LGcs.AI
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DGTEN:一种基于深度高斯的图神经网络,用于具有不确定性量化的动态信任评估

DGTEN: A Robust Deep Gaussian based Graph Neural Network for Dynamic Trust Evaluation with Uncertainty-Quantification Support

Muhammad Usman, Yugyung Lee

AI总结:

DGTEN通过结合不确定性意识的消息传递、时间建模和防御机制,实现了动态信任评估中的鲁棒性和准确性提升。

摘要:

在大规模、快速演变的图中进行动态信任评估需要能够捕捉变化关系、表达校准的置信度并抵抗对抗性操纵的模型。DGTEN(深度高斯基于信任评估网络)引入了一个统一的图基框架,通过结合不确定性意识的消息传递、表达性的时间建模和内置的对抗性攻击防御,实现了这三者。它将节点和边表示为高斯分布,使得语义信号和epistemic不确定性通过图神经网络传播,从而实现风险意识的信任决策,而不是过于自信的猜测。为了跟踪信任如何演变,它将混合绝对高斯-小时glass位置编码与基于Kolmogorov-Arnold网络的无偏多头注意力相结合,然后应用基于常微分方程的残差学习模块,共同建模突发性变化和光滑趋势。鲁棒自适应集成系数分析利用互补余弦和Jaccard相似性修剪或降低可疑交互,遏制声誉洗白、破坏和开-关攻击。在两个带符号的比特币信任网络上,DGTEN在关键领域实现了突出的收益:在比特币-OTC单时间槽预测中,它比最佳动态基线提高了MCC 12.34%;在比特币-Alpha的冷启动场景中,它实现了25.00%的MCC提升,是所有任务和数据集中的最大提升;而在对抗性开-关攻击下,它比基线提高了最多10.23%的MCC。这些结果支持了统一的DGTEN框架。

英文摘要:

Dynamic trust evaluation in large, rapidly evolving graphs demands models that capture changing relationships, express calibrated confidence, and resist adversarial manipulation. DGTEN (Deep Gaussian-Based Trust Evaluation Network) introduces a unified graph-based framework that does all three by combining uncertainty-aware message passing, expressive temporal modeling, and built-in defenses against trust-targeted attacks. It represents nodes and edges as Gaussian distributions so that both semantic signals and epistemic uncertainty propagate through the graph neural network, enabling risk-aware trust decisions rather than overconfident guesses. To track how trust evolves, it layers hybrid absolute-Gaussian-hourglass positional encoding with Kolmogorov-Arnold network-based unbiased multi-head attention, then applies an ordinary differential equation-based residual learning module to jointly model abrupt shifts and smooth trends. Robust adaptive ensemble coefficient analysis prunes or down-weights suspicious interactions using complementary cosine and Jaccard similarity, curbing reputation laundering, sabotage, and on-off attacks. On two signed Bitcoin trust networks, DGTEN delivers standout gains where it matters most: in single-timeslot prediction on Bitcoin-OTC, it improves MCC by +12.34% over the best dynamic baseline; in the cold-start scenario on Bitcoin-Alpha, it achieves a +25.00% MCC improvement, the largest across all tasks and datasets; while under adversarial on-off attacks, it surpasses the baseline by up to +10.23% MCC. These results endorse the unified DGTEN framework.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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