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Asymmetric encryption and signature method with DNA technology

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Science china({1. Sciences) 2010年第3期53卷 506-514页

作者： LAI XueJia1. LU MingXin2, QIN Lei3, HAN JunSong4 & FANG XiWen1.Department of Computer Science & engineering, Shanghai Jiao Tong University, Shanghai 200030,{1. 2School of National information security, Nanjing University, Nanjing 21.093,{1. 3BIOCOMPLEX, 491. Bathurst St. Unit# 209-366, ON M2R 1.9, Canada 4National engineering center for BioChip at Shanghai, Shanghai 201.03,{1. 1. Department of Computer Science & engineering Shanghai Jiao Tong University Shanghai 200030 China2. School of National Information Security Nanjing University Nanjing 210093 China3. BIOCOMPLEX 4915 Bathurst St. Unit# 209-366 Toronto ON M2R 1X9 Canada4. National Engineering Center for BioChip at Shanghai Shanghai 201203 China

This paper proposes DNA-PKC, an asymmetric encryption and signature cryptosystem by combining the technologies of genetic engineering and cryptology. It is an exploratory {1. of biological cryptology. Similar to conventional public-key cryptology, DNA-PKC uses two pairs of keys for encryption and signature, respectively. Using the public encryption key, everyone can send encrypted message to a specified user, only the owner of the private decryption key can decrypt the ciphertext and recover the message; in the signature scheme, the owner of the private signing key can generate a signature that can be verified by other users with the public verification key, but no else can forge the signature. DNA-PKC differs from the conventional cryptology in that the keys and the ciphertexts are all biological molecules. The security of DNA-PKC relies on diffcult biological problems instead of computational problems; thus DNA-PKC is immune from known attacks, especially the quantum computing based attacks.

关键词： cryptology asymmetric encryption digital signature biological cryptology DNA

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改进的基于漫游场景的认证密钥交换协议

通信学报 2009年第S2期30卷 61-68页

作者：周涛徐静中国科学院研究生院信息安全国家重点实验室北京100190 信息安全共性技术国家工程研究中心北京100190 中国科学院软件研究所信息安全国家重点实验室北京100190

由于动态性和易受攻击的结构特性,无线网络环境下认证协议的设计面临新的挑战。2006年,全球移动网络漫游场景下的2个双向认证密钥交换协议被提出。经过分析发现,这2个协议都会遭受到一些实际的攻击。进一步的,2个改进的协议被提出用于... 详细信息

由于动态性和易受攻击的结构特性,无线网络环境下认证协议的设计面临新的挑战。2006年,全球移动网络漫游场景下的2个双向认证密钥交换协议被提出。经过分析发现,这2个协议都会遭受到一些实际的攻击。进一步的,2个改进的协议被提出用于抵御这些攻击。这2个协议不仅保留了原方案的优点,还提高了第2个方案的效率。

关键词：无线通信漫游认证密钥交换匿名性

ON DECORRELATED FAST CIPHER

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Journal of Electronics(china) 2000年第1期17卷 94-96页

作者： Wu Wenling Li Bao Feng Denguo Qing Sihan(engineering {1. center for information security technology,Chinese Academy of Sciences, beijing 1.0080)

Decorrelated Fast Cipher(DFC) is a candidate for the Advanced Encryption Standard (AES). It is shown that the cryptographic properties of the confusion permutation of DFC are weak in this paper. With the same F-function of DFC, a Feistel cipher VDFC which has no resistance against differential cryptanalysis is constructed. This demonstrates the importance of the key addition into DFC sufficiently. As a result, DFC may not be qualified candidate for the AES.

关键词： Round function Permutation Differential cryptanalysis Nonlinearity

DYNAMIC ONLINE TRAFFIC IDENTIFICATION SCHEME BASED ON DATA STREAM CLUSTERING ALGORITHM

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DYNAMIC ONLINE TRAFFIC IDENTIFICATION SCHEME BASED ON DATA S...

201. 4th IEEE International Conference on Broadband Network and Multimedia technology

作者： Dan Li 1 2 3 Xiaobo Xu 1 2 Yang Xin 1 2 Zhengming Hu 1 1 information security center beijing University of Posts and Telecommunications beijing 100876 china 2 National engineering Laboratory for Disaster Backup and Recovery beijing 100876 china 3 beijing Safe-Code technology Co.Ltd. beijing 100876 china

Although researches on network traffic identification have already got some achievements, but most of them are not suitable for online traffic classification by considered the dynamic feature of *** this paper,we propose a dynamic online traffic identification method by introducing density-based clustering algorithm for stream data called DStream,and using the feature select algorithm to reduce dimension of feature *** result of classification is compared with CluStream *** classifer shows better performance than CluStream,and outliers can be detected.

关键词： data stream clustering traffic identification machine learning

Improvement in an Interpolation Algorithm Concerning Multiple Factors to Predict Drift Distance

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Improvement in an Interpolation Algorithm Concerning Multipl...

第三届国际计算机及计算技术农业应用学术会议

作者： Wang Xiu~1 Ma Wei~1 Ji Jianbing~1 1 National engineering research center for information technology in Agriculture 100097 beijing Mao Yijin~(1 2) 2 china Agricultural University 100083 beijing He Ming~3 3 University of Science and technology of beijing beijing 100097 china

＜正＞research on droplet drift distance is one important part of precision agriculture,there are many factors influencing drift distance such as environment conditions and physical property of droplets group. According to previous research results based on other agricultural experts,those factors involving temperature,relative humidity of environment,velocity of wind,droplet sizes,discharge height from nozzle and droplet initial velocity play an essential role in determining how far droplet drift *** Heping Zhu in Ohio State University have designed one quick method to predict droplet drift distance by assuming that each relations between those factors and drift distance is absolutely ***,error generating from assumption itself is obvious and it is entirely necessary to reduce any error caused by designed algorithm as much as *** analysis, such error could be reduced remarkably if partial improvement is made in Dr Heping Zhu’s interpolation *** this paper,relation between droplet size and drift distance is changed to be cubic because of its strong non-linear ***,we develop a software implemented with this new interpolation method,and then both of the results founded on the same but special combination of input variables are compared,and the result reveals that this new interpolation tally better with experiment data than the origin one and relative error based on those special combination of input variables are reduced obviously.

关键词： linear interpolation cubic droplet size drift distance VC++

Cryptanalysis of a Digital Signature Scheme based on Factoring and Discrete Logarithms

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Cryptanalysis of a Digital Signature Scheme based on Factori...

第四届全国信息检索与内容安全学术会议

作者： Jianhong ZHANG~(1.2+) Qing GENG~1.~1.College of Science,North china University of {1.,beijing 1.01.4,china ~2 information security center,beijing University of Posts and Telcommunications,beijing 1.0876,china

Recently,to strengthen security of digital signature scheme,Li and Tzeng[9](for short Li-Tzeng scheme) gave a new digital signature scheme based on the Large Number Factorization problem and the Discrete logarithm problem,and claimed that the scheme was secure and can resist the forgery ***,in this work,we analyze the security of the scheme and show that Li-Tzeng’s signature scheme is *** the same time,we also give the corresponding attack ***,we propose an improve scheme to overcome the weakness of Li-Tzeng’s scheme and show that the improved scheme is secure in the random oracles.

关键词： Digital Signature Forgery Attack security Analysis Factorization Problem Discrete Logarithm Problem

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面向场景的人群疏散并行化仿真

系统仿真学报 2008年第18期20卷 4809-4812,4816页

作者：刘晓平张高峰曹力合肥工业大学计算机与信息学院

随着计算机仿真技术的发展,人员疏散仿真逐渐在公共安全领域得到越来越广泛的应用。目前,关于疏散仿真的研究主要关注于人员行为模型的建立,无法满足对场景的复杂性和各种大范围公共安全事件的实际仿真需求。从对疏散仿真的场景组织研... 详细信息

随着计算机仿真技术的发展,人员疏散仿真逐渐在公共安全领域得到越来越广泛的应用。目前,关于疏散仿真的研究主要关注于人员行为模型的建立,无法满足对场景的复杂性和各种大范围公共安全事件的实际仿真需求。从对疏散仿真的场景组织研究入手,探讨可以为大规模、复杂场景中的人员疏散仿真模拟提供支撑的仿真架构,提出的面向场景的人员疏散仿真算法,并在此基础上,对大规模人员疏散仿真并行化进行了研究。

关键词：计算机仿真人员疏散仿真启发式搜索算法并行化仿真

IMAGE PROCESSING SYSTEM FOR APPRAISING SEED PURITY

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IMAGE PROCESSING SYSTEM FOR APPRAISING SEED PURITY

The 3rd International Symposium on Intelligent information {1. in Agriculture(ISIITA)

作者： Haiye Yu~1.Dong Ren~1.Xiaojun Qiao~2 Xin Zhang~2 Peng Xie~2 ~1.chool of Biological and Agricultural engineering Jihn University Changchun {1. ~2National engineering research center for information technology In Agriculture beijing {1.

＜正＞Seed purity is very important index for sellers and *** crossbred corn,if seed purity is increased 1.,will crop yield be increased 1.%.In recent years,cases of low seed purity causing crop yield reduce or no yield always takes *** loss is very great. Although many conventional methods such as albumen electrophoresis,burgeon rate experiment can measure seed purity,whose data processing speed and accuracy of result analysis cannot satisfy the seed ***’s character of high speed,large information store and many function are well *** to now, there is no {1. on corn seed purity appraisal with image processing,So we study image processing system to appraise seed purity quickly and effectively.

关键词： image processing purity seed

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复杂产品虚拟样机工程

计算机集成制造系统-CIMS 2002年第9期8卷 678-683页

作者：李伯虎柴旭东航天科工集团二院北京100854 清华大学国家CIMS工程技术研究中心北京100084

复杂产品虚拟样机技术是当前CIMS技术研究与应用的热点 ,其样机的开发工作已成为一项复杂的系统工程。复杂产品虚拟样机开发技术是融合与产品有关的专业领域技术与建模仿真技术、信息技术、多媒体虚拟现实技术、人工智能技术、系统... 详细信息

复杂产品虚拟样机技术是当前CIMS技术研究与应用的热点 ,其样机的开发工作已成为一项复杂的系统工程。复杂产品虚拟样机开发技术是融合与产品有关的专业领域技术与建模仿真技术、信息技术、多媒体虚拟现实技术、人工智能技术、系统技术和管理技术等多学科的一门综合性技术。基于笔者的研究与初步实践 ,本文提出了复杂产品虚拟样机工程的概念 ,并对其技术内涵、组成、运行模式、体系结构及其相关关键技术进行了探讨 ,以期促进复杂产品虚拟样机技术在我国企业的研究、实施与应用。

关键词：现代集成制造系统 CIMS 复杂产品虚拟样机虚拟样机工程