新的云存儲文件去重復(fù)刪除方法
發(fā)布時間：2018-07-26 06:46
【摘要】：去重被廣泛地應(yīng)用于云存儲服務(wù)中以節(jié)省帶寬和存儲資源,然而,客戶端去重復(fù)化刪除中仍存在安全缺陷,使外部攻擊者可訪問用戶私有數(shù)據(jù)�；诿芪牡目缬脩舻娜ブ貜�(fù)化刪除方案Xu-CDE被首次提出,該方案支持在外部攻擊者和誠實且好奇的服務(wù)器同時存在的場景下保護(hù)數(shù)據(jù)隱私,具有良好的理論意義和代表性。然而該方案中的用戶所有權(quán)認(rèn)證憑據(jù)缺乏實時性保護(hù),以致不能抵抗重放攻擊。針對該缺陷,提出改進(jìn)方案云存儲中基于MLE與隨機(jī)數(shù)改進(jìn)的客戶端密文去重(MRN-CDE),引入隨機(jī)因子以保障認(rèn)證憑據(jù)的實時性,并利用MLE-KP算法通過原始文件提取密鑰代替用文件本身作為加密密鑰,在提高安全性的同時大大降低了運算量。經(jīng)過安全性分析與測試,結(jié)果表明,所提出的改進(jìn)方案MRN-CDE在Xu-CDE方案的基礎(chǔ)上,不僅增強(qiáng)所有權(quán)認(rèn)證的安全性,而且在時間效率上也有所提高,對于云端大文件的文件去重效果尤其佳,具有一定的應(yīng)用價值。
[Abstract]:Weight removal is widely used in cloud storage services to save bandwidth and storage resources. However, there are still security defects in client repeating deleting, which enables an external attacker to access user private data. A cross user deduplication scheme based on ciphertext is first proposed, which is supported by an external attacker and honest and honest. The curious server protects data privacy at the same time, and has good theoretical significance and representativeness. However, the user ownership authentication credentials in this scheme are lack of real-time protection and can not resist replay attacks. In view of the defect, a client ciphertext based on improved MLE and random numbers in the improved cloud storage is proposed. (MRN-CDE), the random factor is introduced to ensure the real time of the authentication credentials, and the MLE-KP algorithm is used to extract the key from the original file instead of the file itself as the encryption key. The security is greatly reduced while the security is improved. The results show that the proposed improvement scheme, MRN-CDE, is in the Xu-CDE scheme. On the basis, it not only enhances the security of the ownership certification, but also improves the time efficiency. It is especially good for the file of the large files in the cloud. It has a certain value of application.
【作者單位】： 西安電子科技大學(xué)網(wǎng)絡(luò)與信息安全學(xué)院;西安郵電大學(xué)計算機(jī)學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(No.61672415,No.61671360,No.61672413) 陜西省教育廳科研基金資助項目(No.14JK1665)~~
【分類號】：TP333;TP309
，
本文編號：2145192
[Abstract]:Weight removal is widely used in cloud storage services to save bandwidth and storage resources. However, there are still security defects in client repeating deleting, which enables an external attacker to access user private data. A cross user deduplication scheme based on ciphertext is first proposed, which is supported by an external attacker and honest and honest. The curious server protects data privacy at the same time, and has good theoretical significance and representativeness. However, the user ownership authentication credentials in this scheme are lack of real-time protection and can not resist replay attacks. In view of the defect, a client ciphertext based on improved MLE and random numbers in the improved cloud storage is proposed. (MRN-CDE), the random factor is introduced to ensure the real time of the authentication credentials, and the MLE-KP algorithm is used to extract the key from the original file instead of the file itself as the encryption key. The security is greatly reduced while the security is improved. The results show that the proposed improvement scheme, MRN-CDE, is in the Xu-CDE scheme. On the basis, it not only enhances the security of the ownership certification, but also improves the time efficiency. It is especially good for the file of the large files in the cloud. It has a certain value of application.
【作者單位】： 西安電子科技大學(xué)網(wǎng)絡(luò)與信息安全學(xué)院;西安郵電大學(xué)計算機(jī)學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(No.61672415,No.61671360,No.61672413) 陜西省教育廳科研基金資助項目(No.14JK1665)~~
【分類號】：TP333;TP309
，
本文編號：2145192
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