کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4999882 | 1460635 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new approach for the verification of infinite-step and K-step opacity using two-way observers
ترجمه فارسی عنوان
یک رویکرد جدید برای تأیید کدورت بی نهایت و کروم با استفاده از ناظران دو طرفه
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
کنترل و سیستم های مهندسی
چکیده انگلیسی
In the context of security analysis for information flow properties, where a potentially malicious observer (intruder) tracks the observed behavior of a given system, infinite-step opacity (respectively, K-step opacity) holds if the intruder can never determine for sure that the system was in a secret state for any instant within infinite steps (respectively, K steps) prior to that particular instant. We present new algorithms for the verification of the properties of infinite-step opacity and K-step opacity for partially-observed discrete event systems modeled as finite-state automata. Our new algorithms are based on a novel separation principle for state estimates that characterizes the information dependence in opacity verification problems, and they have lower computational complexity than previously-proposed ones in the literature. Specifically, we propose a new information structure, called the two-way observer, that is used for the verification of infinite-step and K-step opacity. Based on the two-way observer, a new upper bound for the delay in K-step opacity is derived, which also improves previously-known results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Automatica - Volume 80, June 2017, Pages 162-171
Journal: Automatica - Volume 80, June 2017, Pages 162-171
نویسندگان
Xiang Yin, Stéphane Lafortune,