《代理重加密方案的研究开题报告.doc》由会员分享，可在线阅读，更多相关《代理重加密方案的研究开题报告.doc（12页珍藏版）》请在三一办公上搜索。
1、First compliance review of the application of the appraisal Committee, only through the compliance review of the application to take part in a detailed review. 8.1 application compliance review: does not meet one of the following conditions, procuratorial Agency to submit application through complia
2、nce reviews, be invalidated: (1) application of the formats, contents, meet the requirements of selected files, powers of Attorney, declarations by the legal representative and the tender agent application to meet the requirements; (2) licence and a bidding agent qualifications meet the requirements
3、; (3) the similar project tendering agency agent number and provide proof of material compliance; (4) the tendering Agency intends to put into this project the number of professionals to meet the requirements; (5) are intended to the agent of the project as a project manager has similar projects the
4、 number of and references to meet the requirements; (6) no fraud case. 8.2 application review in detail the Evaluation Committee through compliance reviews will be selected for detailed review of the application. 8.2.1 tender agent institutions similar project tender performance requirements (16 poi
5、nts) tender agent institutions similar project tender performance 16 points, by two part composition (1) agent similar project of cumulative bid amount scored calculation rules for: Agent water project bid amount (on January 1, 2007 has has bid notice for associate) cumulative each reached 100 milli
6、on Yuan have 2 points, water project cumulative bid amount scored up not over 6 points. In addition, completes a bid worth more than 500 million yuan in total 1 minute, but other items score accumulated winning amount up to a maximum of 6 points. (2) calculation rule for the number of agents similar
7、 projects: proxy bid amount (since January 1, 2007 winning notice shall prevail) bidding projects in more than 50 million Yuan by 2 points, but the Agency projects the number of scores up to 3 minutes. 8.2.2 to be agents of the construction project as a project manager in the same project performanc
8、e (10 points) Project Manager agent performance scores including agents of the bidding agencies of similar projects, as well as in other similar project tendering agency service agent during performance. Total 10 Project Manager agent performance, made up of two parts (1) acting like the accumulated
9、 winning amount calculation rule: agents for water conservancy project bid amount (since January 1, 2007 winning notice for example) cumulative average reached 100 million Yuan 3 but scored no more than 5 minutes. (2) calculation rule for the number of agents similar projects: proxy bid amount (sinc
10、e January 1, 2007 winning notice for example) in the more than 50 million Yuan water conservancy project period of 3 minutes, but scores the number of agents similar projects up to a maximum of 5 points. Project Manager demonstrated to provincial-level and higher peoples Government or the developmen
11、t and Reform Commission published the winning bidder on the designated media publicity shall prevail. 8.2.3 staff requirement (25 points) 1, to the construction project serving personnel, 4 years experience in tendering agent, 2 points per person, 2 years experience in tendering agent .Pig is not a
12、pig. With domestic international market and technology big environment of changes, as China traditional industry of pig production of job way and profit way are requirements related industry for resources integration, to quality security for premise, regulation based farming, and management cost and
13、 the production, and sales cost, go standardization, and scale, and intensive, and market road, fast upgrade whole industry chain of regulation capacity, market competition capacity and anti-risk capacity. First, industry analysis (a) the basic situation in China is a traditional hog production and
14、consumption country, 2008 46.15 million tons of pork, pig stock 462.64 million head by the end pig slaughter 609.6 million. National pig industrys annual production value at around 650 billion yuan, nearly 50% per cent of annual output value of animal husbandry. Sichuan province in 2008 produced 6.5
15、2 million tons of pork, with 694,000 tons of Chengdu city, live pig sell 10.46 million, first 15 Vice-provincial cities in the country. The whole nation advantage regional planning (2008-2015) there are 437 counties (cities), 55, Sichuan, Chengdu has 7 (including in pengzhou). International pig indu
16、stry mainly include the European Union, the United States, and Canada, and Brazil and other absolute scale of animal husbandry industry and technology developed countries. Market 1, the domestic market from Chinas meat consumption habits and economic analysis of the development situation, the emerge
17、nce of new trends in the market of domestic pork and its products. Docking is a pig production and sales more closely. The Yangtze River Delta, Pearl River Delta and the Bohai rim economic developed area industrial structure adjustment gathered pace, two or three industries to the Central and Wester
18、n bias. Second, the rigid domestic consumption growth. For a long period, pork is still the largest variety of meat consumption in China, the absolute consumption continues to grow. Especially in the vast rural market growth potential. Third, market for pork and higher product quality requirements.
19、Pollution-free pork safety and health has shown a very good market prospects. Four is the market changing. Currently, cold meat, more and more varieties of meat and pork meat products, which accounted for a large proportion of pork consumption, stores, chain stores, supermarkets and other marketing
20、methods is on the rise, and transport has been extended to more than 2000 km in RADIUS. Chengdu is an important River pig resource market, the citys commercial rate reaches above 60% of live pigs, pork and raw materials primary processing products in the domestic and international reputation is high
21、. Western hog trading center in Chengdu and provides disease-free areas of construction in order to further accelerate the development of swine industry realizes space and conditions. 2, the international markets at present, annual volume of trade in live pigs in the world year around 18 million, ab
22、out 6 million tons of pork trade. A large net exporter of pork is mainly the EU and North America,-importing countries mainly in Asia, Japan, and Korea, and Singapore, the Philippines, Hong Kong and other countries and regions, as well as Russia, about 3 million tonnes were imported. It is predicted
23、 that the world meat consumption increase of 80% in Asia in the future, our country has obvious geographical advantages, export potential. With the advancement of live pigs superiority industry belt construction, animal disease .请用蓝黑或碳素墨水书写硕士研究生学位论文工作计划及开题报告书学 号 研究生姓名 学科 、专业 研 究 方 向 指导教师姓名、职称 培 养 学
24、院 开题报告时间 年 月 日 河海大学研究生院制表4.1 application of the Chinese language application for proxy bidding agency application system. 4.2 bidding agent applications should be submitted by the Agency included in the 5th chapter of the content, and than select file asked to provide appropriate documentation. 4.3
25、proxy application shall affix its official seal coding and page by page in the specified location. Agent a copy of the application shall have to number the pages and signed original copy (copy) (including supporting documents), and copy should be exactly the same. 4.4 application there shall be no l
26、oose pages. 4.5 agent application should be complete with indelible ink (powdered) prints, the agent shall not alter any page of the application. 4.6 bidding agencies offer should be based on the interim measures for the management of tendering agents service charges (meter prices 20021980) rules of
27、 the Nineth, tender agent service charges using the difference progressive billing rate. Charges in accordance with the tendering agents service charges and, in conjunction with the provisions of the specific circumstances of the project shall not be floating up and down-floating range must not exce
28、ed 20%, otherwise the application cannot pass compliance checks, be invalidated. Due to bidding agency selection and principal-agent contracts signed during charging base bid amount has not yet been produced, it can only be according to the rates of price, bid and the bid amount determines after the
29、 end, controlled response rates calculated shall pay tender fee (tender agency fee accounts for the actual bidding agent item for fares). Than the selected person tendering agents service charge control the upper and lower limits, Cap for the State Development Planning Commission of the interim meas
30、ures for the management of tendering agents service charges (meter prices 20021980) of tendering agents service fees under 100%, the lower limit for the State Development Planning Commission of the interim measures for the management of tendering agents service charges (meter prices 20021980) of ten
31、dering agents service fees under 80%. Tendering agents service charge base should include the following tenders: construction, supervision and material over the above tenders are expected to be important, with each tendering agency entrusted with tender bid amount as a base for a separate computatio
32、n of tendering agents service fees. Tendering agents service fee payment in accordance with the General Office of the State development and Reform Commission on tendering agents service charge of notification on the relevant issues (the change price 2003857). Sale of prequalification documents and s
33、olicitation documents going to choose all, pricing should be based on the principle of profit not files, must not violate the relevant provisions in the price Department. 4.7 requirements in the form of application proxy application shall be prepared in the 5th chapter of the format. Application of
34、various supporting documents should be requested by the selection of files grouped by order. Comparison and selection of the bidding agencies must provide supporting documents required by the file; the file you selected does not have the required supporting documents, bidding agency acknowledged the
35、 need to provide, or you can provide. Proxy application shall be bound, and page-by-page coded in the order. 5th chapter application format notes: bidding agent .11 说 明1. 学位论文计划应在导师的指导下按照培养方案要求制定。2.开题报告一般安排在第三学期，开题报告在负责培养的学院进行，由导师主持并邀请同行专家参加。3. 开题报告的时间、地点须提前三天公布，欢迎师生参加旁听。4. 论文计划书及开题报告书（空白表）由负责培养的学院于
36、研究生入学后的第三学期初发放，第四学期初交学院汇总后存档，以备研究生院审查。5. 本材料系永久性档案，请用蓝黑、碳素墨水或墨汁等耐久材料书写。6. 本表可以下载打印，打印时请使用A4纸正反打印，不得改变表格内容及格式。签名部分必须由签名者亲笔签署。7.有关详细规定请查阅河海大学研究生工作手册。论文计划及开题报告计划论文题目代理重加密方案的研究选题来源选择打（）1、国家计委、科委项目（ ）；2、国家经贸委项目（ ）；3、国家自然科学基金项目（ ）；4、国务院其它部委项目（ ）；5、主管部门（部委级）项目（ ）；6、省，市，自治区项目（ ）；7、学校级项目（ ）；8、自选项目（ ）；9、其它（ ）
37、。预 计经 费约 元预计完成日期 2015 年 6 月主要内容（参考下列几方面）1. 论文的选题依据；2. 本课题在国内外的研究动态3. 课题在理论或实际应用方面的意义、价值以及可能达到的水平；4. 对此课题开展研究的设想，难点及拟解决的重点问题； 5. 工作计划、技术路线，预期结果；6. 预计工作量及进度安排。计划及报告具体内容：1 论文的选题依据：密码学是一门古老的艺术，主要是研究如何隐密地传递信息的学科。历史上，密码学在人类战争的进程中起到了举足轻重的作用。直到1949年Shannon1发表了题为Communication Theory of Secrecy的著名论文后，密码学才由一门艺
38、术转变成了一门科学。该论文首次把信息论引入到密码学中，用统计学的观点对信源、密码源和接收的密文进行了数学的描述和定量的分析，从而把古老的密码学引导到科学的轨道中来。在1976年，Diffie和Hellman2在他们著名的论文New Directions in Cryptography中创造性地提出了公钥密码系统的概念。在这种密码系统中，加密和解密所用的密钥是不相同的，而且在计算上从加密密钥是推不出解密密钥的，而从解密密钥很容易计算出加密密钥。如此一来，保密密钥可以公开，而只要保密加密密钥。他所需要维护的密钥与用户群的大小无关，这就大大降低了密钥维护的工作量。同时，加密者在加密前，不用和解密者事
39、先商定密钥，大大降低了密钥分发和管理的难度。随着计算机网络带宽技术的发展和计算机多媒体编码的进步，在因特网上进行数字内容交易变得十分便捷。但是,由于数字内容是可以拷贝和再分发的,这损害了数字内容生产厂商的利益，因此数字内容生产厂商开发了数字版权管理(Digital Rights Management (DRM)技术来防范数字内容的拷贝和再分发。一个DRM系统只有拥有许可证的程序才能读取数字内容。但是，DRM系统最受争议的就是它的跨域操作问题，因为DRM系统没有一个标准，各个数字内容生产商都设计了各自的一套DRM系统。如此一来，消费者不能自己决定所购买的数字产品播放设备。比如，从iTunes买的
40、数字内容只能在iPod上播放。这大大打击了消费者的购买欲。根据INDICARE3的调查，消费者宁愿花更高的价钱来换取跨域操作。但是，现有的DRM跨域操作系统都十分之复杂，代价高昂，都要对原有的DRM系统进行很大的改动。这对于已经在DRM系统中投入巨大的人力和物力的数字内容生产厂商来说是不能接受的。为了解决这个问题，在2006年的ACMDRM会议上，Taban等人提出了一个十分有效的DRM跨域操作系统。他们在原有的DRM系统基础上，增加了一个名为跨域操作管理者 (Domain Interoperability Manager(DIM)的中间模块。该模块可以把域A中的密文(许可证)转换为域B中的密
41、文(许可证)，而模块本身不能对密文进行解密，也不能单独生成一个域A中到域B中的许可证。从而安全有效地达到了跨域操作的目的。基于这些问题的存在性，急需要一个半可信的代理者(Proxy)能够将原本用授权人的公钥加密所得密文，转换成用受理人的公钥加密所得的针对同一明文的密文，并且可以保证该代理者无法获知该明文的任何消息。很显然，传统的公钥加密方案和数字签名方案是不能实现这些功能的，只有具备安全转换功能的密码系统才能安全有效地实现这些功能，而代理重加密就是这样一种密码系统。2 本课题在国内外研究动态代理重加密（Proxy Re-Encryption, PRE）的概念最早由Blaze4等人在1998年的
42、欧洲密码学年会上提了出来。但是，在Blaze等人的文章中,他们并没有给出代理重密码规范的形式化定义，特别是对于代理重签名，使得人们没有很好地认识到代理重密码的好处，同时经常使人把代理重签名和其他一些签名类型相混淆,如代理签名(proxy signature），这个原因也使得代理重密码学的发展相对缓慢。为了改变这种情况,Ateniese等人对代理重密码进行了形式化的定义, 并且使用双线性对构建了随机预言模型下安全的单向代理重加密方案，该方案能阻止代理者和受委托者合谋来揭示委托者的密钥。至此代理重密码学引起了广泛的关注,各种各样的代理重密码方案及其应用被提出。Ateniese等5利用双线性配对构造
43、了3中单向PRE方案，他们的PRE方案都只是在DBDH假设的标准模型下满足选择明文安全（CPA, chosen-plaintext attack）的。但实际的应用场合通常都是要求方案满足选择密文安全（CCA，chosen-ciphertext attack）的。Canetti等6首次利用CHK(canetti-halevi-katz methodology)7技术构造了一种在标准模型下满足CCA安全的双向多跳PRE方案，但是与Atteniese等提出的双向PRE方案缺点一样，该方案也不能抵抗共谋攻击。值得注意的是，构造一个单向的PRE方案比双向PRE方案困难，因为任何双向的PRE方案都可以通过
44、单向的PRE方案实现。2006年Green和Ateniese9把PRE概念推广到基于身份的密码机制，提出了基于身份的PRE方案（Identity-Based PRE, IB-PRE）。Libert和Vergnaud10在2008年PKC会议上，提出了第一个标准模型下选择密文安全的单向PRE方案。上述文献所提出的方案都需要双线性配对运算，而运行一次双线性对运算的时间至少是椭圆曲线上点乘运算的20倍以上。虽然双线性对的计算不断得到优化和发展，但是该计算仍然比较消耗计算资源。为了弥补这一缺陷，Matsuda、Nishimaki和Shao11,12提出了标准模型下不适用双线性对的PRE方案，基于决定性
45、Diffie-Hellman(DDH)假设和因数分解难题假设，达到了CCA安全和抗合谋攻击安全。传统的代理重加密并不能适应所有实际情况的应用，比如上述的代理重加密方案无法解决这一问题：代理者根据提示信息（关键字）来选择性地进行代理重加密。为了解决这一问题，Weng、Deng、Chu、Ding、和Lai13,14,15提出了条件代理重加密（Conditional Proxy Re-Encryption, CPRE），使得只有符合设定关键字的密文能够被代理者转换且被受委托者解密，随后Fang等人构建了匿名的条件代理重加密方案，解决了Weng等人提出的公开问题。之前的好多方案都是代理者在同一个域中进
46、行的转换，整个系统公开参数都是相同的，包含相同的加解密算法，半可信的第三方能够构造的代理重加密密钥的复杂性比较小。但是，在实际生活中，很多的转换都是在不同的域间进行的转换，然而，能够不同的域之间进行转换的代理重加密方案还没有实现。Tang等16提出了一个域间IBPRE方案，首次实现了这个功能。和传统的加解密方案类似，在随机预言模型下的代理重加密方案已经提出了很多，但是在标准模型下的方案却进展相对缓慢，因为标准模型下的证明是相对困难的，所涉及到的算法比较多。Wang17等人提出了第一个在标准模型下CCA安全的IBPRE方案，Chu, Canetti等人19,20 也相继提出了基于身份代理重加密方
47、案。密钥隐私的代理重加密也是一个相对研究的热点。在现在这个信息爆炸的时代，人们对隐私保护的警惕性越来越高。因此，匿名性也是一个热点研究问题。Ateniese等18人首先提出了一个密钥隐私的代理重加密方案。然而，他所提出的方案是基于公钥加密方案。在一系列的努力下，最近，Shao21提出了一个在随机预言模型下的匿名的基于身份代理重加密方案。3 课题在理论或实际应用方面的意义、价值以及可能达到的水平1998年，Blaze、Bleumer等人提出了代理重加密的概念，PRE使得一个半可信的代理者(Proxy)能够将原本用授权人Alice的公钥加密所得密文，转换成用授权人Bob的公钥加密所得的针对同一明文
48、的密文，并且可以保证该代理者无法获知该明文的任何消息。近年来PRE已成为一个非常有用的密码学工具，在不少场合得到了较为广泛的应用，譬如分布式文件系统、加密垃圾邮件的过滤、加密邮件的转发等。现在来介绍PRE的定义和安全模型。由于目前存在的方案大都是单向单跳的PRE方案，且用处更加广泛，因此我们将着眼于单向单跳的PRE。这里我们一般都会认为原始密文为第二层密文，重加密后的密文称为第一层密文。一个单向单跳的PRE方案由如下算法组成：u Setup(1k): 输入一个安全参数1k，该系统建立算法输出一个全局公开参数params，其中包含对明文空间M的叙述。u KeyGen(params): 输入全局公开参数params，每个用户均使用该算法来生成公私钥对（pk, sk）。为简略起见，我们假设余下算法的输入均隐含有全局公开参数params。u ReKeyGen(ski，pkj):输入用户i的私钥以及另一用户j的公钥，该算法产生一个由用户i到用户j的重加密密钥rkij。u Enc(pk，m):输入公钥pk和消息m，该加
