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基于3维对偶正交基的技术,提出了一种新的密钥策略的基于属性的加密方案。该方案在素数阶群上构造,支持单调访问结构,具有自适应安全性。方案利用双重系统加密的证明方法将方案的自适应安全性归约到判定线性假设。与同样是自适应安全的密钥策略ABE方案相比,提出的方案在同等安全性上具有更高的效率。 相似文献
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To order to address the problem of cloud storage data security,the generic proxy-based data protection system was proposed,which could automatically and transparently secure sensitive data in browser-based cloud storage applications.A novel dynamic program analysis technique was adopted based on JavaScript API function hooking for automatically extending to various cloud applications.And a novel proxy executed searchable encryption solution was presented so that it could achieve data encryption while maintaining the original functions of cloud applications.Experimental results show that the system can support a variety of typical cloud services,effectively protect sensitive data,and bring a relatively low overhead. 相似文献
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With the rapid development of the genomic sequencing technology, the cost of obtaining personal genomic data and effectively analyzing it has been gradually reduced. The analysis and utilization of genomic data gradually entered the public view, and the leakage of genomic data privacy has attracted the attention of researchers. The security of genomic data is not only related to the protection of personal privacy, but also related to the biological information security of the country. However, there is still no effective genomic data privacy protection scheme using Shangyong Mima(SM) algorithms. In this paper, we analyze the widely used genomic data file formats and design a large genomic data files encryption scheme based on the SM algorithms. Firstly, we design a key agreement protocol based on the SM2 asymmetric cryptography and use the SM3 hash function to guarantee the correctness of the key. Secondly, we used the SM4 symmetric cryptography to encrypt the genomic data by optimizing the packet processing of files, and improve the usability by assisting the computing platform with key management. Software implementation demonstrates that the scheme can be applied to securely transmit the genomic data in the network environment and provide an encryption method based on SM algorithms for protecting the privacy of genomic data. 相似文献
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为了提高信息传输过程中的安全性,对当前的加密方法进行了研究,并介绍了通过对密钥进行处理增加加密安全性的研究现状。根据数据在发送和加密过程中要进行分段和分组的原理,设计了一种多密钥加密的方法:由源密钥和随机数生成分段密钥组和分组密钥组,由序号按匹配算法为每个分段和分组的数据选取相应密钥,实现多个密钥对信息传输过程中的加密。最后,一方面通过MATLAB测试验证该方法的加密效率,另一方面从理论和数学角度分析该方法的安全性并和传统方法进行对比,得到结论:该方法不需要太多开销即可在传统方法的基础上增加安全性。 相似文献
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基于区块链的公钥可搜索加密方案 总被引:1,自引:0,他引:1
针对公钥加密方案的陷门安全问题,引入随机数构造陷门与索引,用于抵御来自服务器内部的关键字猜测攻击,避免因服务器好奇行为带来的数据泄露。对第三方的可信问题进行研究,将区块链技术与可搜索加密方案相结合,使用智能合约作为可信第三方进行检索工作,既可以防止服务器内部的关键字猜测攻击,又可以保证检索结果的正确性,从而限制服务器在下发数据时的恶意行为。通过安全性分析,验证了所提方案满足IND-KGA安全性。经过与其他方案进行实验对比,证明了所提方案在时间开销上具有一定的优势。 相似文献
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数据加密技术在嵌入式系统中的应用 总被引:1,自引:1,他引:0
在装备的试用状态管理和敏感数据保护等方面,数据加密技术的应用越来越广泛。针对嵌入式系统的特点和数据加密需求,给出了一种可应用到嵌入式系统的数据加密算法。该方法在随机数序列的基础上实现数据加密,并综合应用了数据二次寻址、置换表、数据字节运算、改进的循环冗余校验等技术,相同明文每次加密后形成的密文数据各不相同,具有加密强度高、算法容易实现、密文数据防篡改等特点。该技术已成功应用于C8051F020和MSP430F135单片机系统,分别实现了某两型装备的试用期状态管理和敏感数据保护。 相似文献
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A linear quadtree compression scheme for image encryption 总被引:5,自引:0,他引:5
A private key encryption scheme for a two-dimensional image data is proposed in this work. This scheme is designed on the basis of lossless data compression principle. The proposed scheme is developed to have both data encryption and compression performed simultaneously. For the lossless data compression effect, the quadtree data structure is used to represent the image; for the encryption purpose, various scanning sequences of image data are provided. The scanning sequences comprise a private key for encryption. Twenty four possible combinations of scanning sequences are defined for accessing four quadrants, thereby making available 24n × 4n(n − 1)/2 possibilities to encode an image of resolution 2n × 2n. The security of the proposed encryption scheme therefore relies on the computational infeasibility of an exhaustive search approach. Three images of 512 × 512 pixels are used to verify the feasibility of the proposed scheme. The testing results and analysis demonstrate the characteristics of the proposed scheme. This scheme can be applied for problems of data storage or transmission in a public network. 相似文献
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在可搜索加密方案中,无论是云端服务器还是用户,都可能存在欺骗行为。为了解决这种安全问题,给出公平性安全的定义,提出基于区块链的可搜索加密方案。通过第三方可信机构(trusted authority,TA)验证数据传输过程中数据的一致性,区块链记录完整验证结果以防止篡改,使所涉及的实体达成一致的安全共识,从而实现公平性安全。安全性与复杂性分析表明,该方案是可行的。当该方案与搜索结果可验证的可搜索加密方案相结合时,可优化成基于区块链的搜索结果可验证的可搜索加密方案,其安全性将得到进一步的提高。 相似文献
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基于身份加密机制的光学加密密钥系统 总被引:1,自引:0,他引:1
从非对称的基于身份密钥体系出发,提出了一种适用于光学加密系统密钥管理的方法.首先简要介绍了基于身份密钥体系,特别是Boneh-Franklin算法,然后针对光学加密参数安全传输问题,给出了非对称密钥系统的密钥生成、分配、更新等算法,并从方法的复杂性、安全性等方面对算法进行了分析,最后对二维码加密问题进行了仿真,结果表明算法是正确有效和安全的 相似文献
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自动化系统中的数据加密传输 总被引:1,自引:1,他引:0
密码技术是主动的安全技术,是提高数据信息保密的主要手段,在本文中我们将采用端到端的加密传输技术在局域网办公自动化系统中进行应用,在系统中增加加密模块实现文件的加密传输.加密传输交易数据包,提高数据信息的保密性.信息交换的每一步均进行MAC校验,以确认数据包的真伪.分级、分散管理各级密钥,保证密钥安全.该加密传输技术已在实际应用中得到了验证,取得了良好效果. 相似文献
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In view of high efficiency and security requirements in WSN encryption algorithm,a lightweight chaotic block encryption algorithm was designed and a novel scheme of dynamic sub keys extension was proposed.To greatly reduce the computing burden of WSN nodes,this scheme made full use of WSN cloud servers monitoring platform,which was powerful in data computing and processing,and transfered the sub keys synchronization task from nodes to cloud servers.Experimental results and performance analysis show that the scheme has good characteristics of diffusion,confusion and statistical balance,strong key security and high algorithm efficiency.It has a good application prospect in the field of WSN communication encryption. 相似文献
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本文系统性的对大数据视角下数据加密技术方面易出现的的问题进行了详细阐述,力求做到发现问题、了解问题,并高效的解决一切已经出现或可能出现的新难题,并同时做到防患于未然.结果采用了有效的数据加密技术,的确是面对和解决大数据安全问题行之有效的方法,并对改进大数据视角下的数据加密技术进行了总结,提出了更加有用的建议. 相似文献