本文選題：數(shù)據(jù)庫加密 + 加密算法　； 參考：《重慶理工大學(xué)》2017年碩士論文

【摘要】：計(jì)算機(jī)和智能手機(jī)的普及,加速了信息的產(chǎn)生與傳播。信息,已經(jīng)成為人們最重要資產(chǎn)之一,正是如此,信息安全也受到前所未有的威脅。數(shù)據(jù)庫技術(shù)的發(fā)展與應(yīng)用,讓數(shù)據(jù)庫成為信息的聚集地,作為最核心部分以及信息存儲(chǔ)交互的中樞,傳統(tǒng)的安全措施,并不能夠保證數(shù)據(jù)的安全存儲(chǔ)。而數(shù)據(jù)庫加密則是最后的衛(wèi)士,它將數(shù)據(jù)轉(zhuǎn)換成密文形式存儲(chǔ),即使丟失,也不會(huì)泄露。本文針對(duì)BLE門禁管理系統(tǒng),展開了數(shù)據(jù)庫加密技術(shù)的研究。在加密算法上,針對(duì)DES、3DES、AES對(duì)稱加密算法和RSA非對(duì)稱加密算法,研究了它們的設(shè)計(jì)原則,分析了它們的加解密過程。本文設(shè)計(jì)出了一個(gè)簡潔的加解密軟件,在其上用3DES和AES算法對(duì)不同大小文本文件進(jìn)行加密測試,完成了效率的比較,證明了AES算法的優(yōu)勢。同時(shí),針對(duì)AES每輪子密鑰都可以向上或向下推導(dǎo)的威脅,本文改進(jìn)了AES密鑰擴(kuò)展算法,減少了每輪子密鑰間的相關(guān)性,用Java編程測試后,發(fā)現(xiàn)兩種擴(kuò)展算法的運(yùn)行效率幾乎接近,從而在不影響加解密的基礎(chǔ)上,進(jìn)一步保證了AES的安全性。針對(duì)BLE門禁管理系統(tǒng)的數(shù)據(jù)庫加密,本文運(yùn)用混合加密體制,即用AES算法進(jìn)行數(shù)據(jù)的加密和解密,而用RSA算法去保護(hù)AES的密鑰。一方面,保護(hù)了AES算法的密鑰安全,另一方面,則規(guī)避了RSA算法密鑰過長,加解密效率不高的缺陷。此外,針對(duì)混合加密體制的密鑰管理,完成了加密字典的設(shè)計(jì)。分析加密與解密過程后,利用Java編程與JCE分工合作的方式,實(shí)現(xiàn)了加解密引擎的設(shè)計(jì)。本文運(yùn)用Java編程語言,MyEclipse開發(fā)環(huán)境,用Navicat對(duì)MySQL進(jìn)行可視化管理,完成了BLE門禁管理系統(tǒng)的設(shè)計(jì)與開發(fā)。采用字段級(jí)加密粒度與DBMS外層加密方式,完成了本文的加密設(shè)計(jì)在系統(tǒng)中的測試與實(shí)現(xiàn)。最后結(jié)果表明,本文對(duì)數(shù)據(jù)庫加密系統(tǒng)的設(shè)計(jì),在BLE門禁管理系統(tǒng)中切實(shí)有效,保證了數(shù)據(jù)的安全性和可靠性。
[Abstract]:The popularity of computers and smart phones has accelerated the generation and dissemination of information. Information has become one of the most important assets of people. With the development and application of database technology, database becomes the gathering place of information. As the core part and the center of information storage and interaction, the traditional security measures can not guarantee the safe storage of data. Database encryption is the last guard, which converts data into encrypted storage, which, if lost, does not leak. In this paper, the database encryption technology is studied for BLE access control system. In the aspect of encryption algorithm, the design principle and encryption process of DES3DESU AES symmetric encryption algorithm and RSA asymmetric encryption algorithm are studied, and their encryption and decryption process are analyzed. In this paper, a simple encryption and decryption software is designed, on which 3DES and AES algorithms are used to encrypt different size text files. The comparison of efficiency is completed and the advantages of AES algorithm are proved. At the same time, in view of the threat that AES keys can be deduced up or down per wheel, this paper improves the AES key extension algorithm and reduces the correlation between keys per wheel. It is found that the efficiency of the two extended algorithms is close to that of the encryption and decryption, and the security of AES is further ensured. In view of the database encryption of BLE access control system, this paper uses mixed encryption system, that is, encryption and decryption of data by AES algorithm, while RSA algorithm is used to protect AES key. On the one hand, it protects the key security of AES algorithm, on the other hand, it avoids the defects of RSA algorithm that the key is too long and the efficiency of encryption and decryption is not high. In addition, the encryption dictionary is designed for the key management of mixed encryption system. After analyzing the process of encryption and decryption, the design of encryption and decryption engine is realized by Java programming and JCE. In this paper, we use the Java programming language to develop MyEclipse, and use Navicat to manage MySQL visually, and complete the design and development of BLE access control management system. Field level encryption granularity and DBMS outer encryption are adopted to test and implement the encryption design in the system. Finally, the result shows that the design of database encryption system is effective in BLE access control system, and ensures the security and reliability of data.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP311.13;TP309.7

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