IC697MSC802
IC697MSC802
IC697MSC802
所提方案可針對如下幾種攻擊的應(yīng)對。惡意代碼攻擊: 利用數(shù)控網(wǎng)絡(luò)系統(tǒng)的硬件、軟件、協(xié)議漏洞進(jìn)行惡意代碼攻擊。在綜合防護體系中，部署在外網(wǎng)和內(nèi)網(wǎng)惡意代碼檢測機制可檢測惡意攻擊，可信訪問監(jiān)控可發(fā)現(xiàn)通過移動存儲設(shè)備的入侵，可信虛擬防護域基于完整性的訪問控制需求可阻斷惡意代碼攻擊，并預(yù)警或啟動自治愈修復(fù)。未授權(quán)訪問: 首先由安全隔離設(shè)備進(jìn)行初步隔離，可信數(shù)據(jù)防護機制進(jìn)行拒絕訪問操作，并提交審計服務(wù)器。信息泄露: 主要是內(nèi)部網(wǎng)絡(luò)信息泄露，可依靠可信數(shù)據(jù)隔離環(huán)境、敏感數(shù)據(jù)安全保護域、對數(shù)據(jù)讀寫的認(rèn)證來防護。根據(jù)操作日志，進(jìn)行審計。拒絕服務(wù)攻擊: 主要針對 DNC 數(shù)控網(wǎng)
絡(luò)中的系統(tǒng)服務(wù)器、DNC 傳輸服務(wù)器、接口交換機進(jìn)行攻擊，使之不能正常工作或緩沖區(qū)溢出。綜合防護方案中主要通過協(xié)議檢測監(jiān)控訪問流量，通過可信計算平臺阻止非可信訪問請求。一旦數(shù)控機床出現(xiàn)故障，啟動自治愈機制中的冗余機制，保證可用性，同時利用自檢機制恢復(fù)故障。防護方案協(xié)同性: 當(dāng)面臨各種攻擊時，綜合利用可信防護、數(shù)據(jù)和系統(tǒng)基礎(chǔ)防護、自治愈防護，協(xié)同防護數(shù)控系統(tǒng)。
(1) 防護方案的時間協(xié)同?？尚欧雷o用于事前監(jiān)控，實現(xiàn)可信訪問控制; 自治愈機制用于事后容錯恢復(fù); 基礎(chǔ)數(shù)據(jù)安全防護配合可信數(shù)據(jù)防護，用于事中主動數(shù)據(jù)訪問控制; 基礎(chǔ)系統(tǒng)安全防護配合可信防護，
對可信防護拒絕進(jìn)程進(jìn)行入侵檢測，收集攻擊證據(jù)，用于事后審計。在攻擊威脅到數(shù)控系統(tǒng)可用性時，啟動自治愈容錯恢復(fù)機制。
(2) 防護方案的空間協(xié)同。所提方案充分利用數(shù)控網(wǎng)絡(luò)架構(gòu)不同資源屬性來部署防護技術(shù)，數(shù)控機床網(wǎng)絡(luò)實時性要求高，采用可信虛擬域隔離機制防止非授權(quán)訪問，并把針對數(shù)控機床的入侵防護機制部署在數(shù)控網(wǎng)絡(luò)中。一旦突破所有防護措施，啟動自治愈機制，隔離修復(fù)受損設(shè)備。在DNC數(shù)控網(wǎng)絡(luò)中，部署可信平臺、入侵防御監(jiān)控平臺，確保核心控制系統(tǒng)安全性。在辦公網(wǎng)中部署復(fù)雜可信網(wǎng)絡(luò)、入侵檢測、惡意代碼檢測等措施，確保外圍網(wǎng)絡(luò)可靠性。
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