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Watermark detection schemes with high security

Watermark detection schemes with high security

引用

international conference on information technology: coding and computing (itcc)

作者： Liu Yongliang Xiaolin Yang Hongxun Yao Tiejun Huang Wen Gao Harbin Institute of Technology China Institute for Computing Technology China

ISBN: (纸本)0769523153

In traditional watermark detection, a prover exposes the secret information that can be used to remove the watermark to the possible dishonest verifier in order to prove a watermark presents in a digital data. This is a significant security risk because a potential attacker is able to remove the watermark once secret information like watermark or embedding key is known. Some of previous schemes proposed as solution haven't achieved desirable result really. Their lacking of security and validity is the most severe problem. In this paper, we propose the watermark detection schemes with high security, which are based on zero knowledge protocol and public-key encryption scheme, for both blind watermark scheme and non-blind watermark scheme. These two schemes provide copyright proving without revealing any information that can be used for removing watermark during the detection process. Both security and validity of watermark detection can be significantly improved using these two schemes.

关键词： Watermarking information security Protocols Data security Public key Cryptography Computer networks Protection Intellectual property Object detection

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Concept-based information access

Concept-based information access

引用

international conference on information technology: coding and computing (itcc)

作者： R. Ozcan Y.A. Aslandogan Department of Computer Science and Engineering University of Technology USA

Concept-based access to information promises important benefits over keyword-based access. One of these benefits is the ability to take advantage of semantic relationships among concepts in finding relevant documents. Another benefit is the elimination of irrelevant documents by identifying conceptual mismatches. Concepts are mental structures. Words and phrases are the linguistic representatives of concepts. Due to the inherent conciseness of natural language, words can represent multiple concepts and different words may represent the same or very similar concepts. Word sense disambiguation attempts to resolve this ambiguity using contextual information. The use of an ontology facilitates identification of related concepts and their linguistic representatives given a key concept. Latent semantic analysis, on the other hand, attempts to reveal the hidden conceptual relationships among words and phrases based on linguistic usage patterns. In this work we explore the potential of concept-based information access via these two methods. We examine under what circumstances concept-based access becomes feasible and improves user experience.

关键词： Ontologies Testing Data mining Computer science Indexing information resources Space technology Natural languages Pattern analysis information retrieval

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Digital chips for an on-line casino

Digital chips for an on-line casino

引用

international conference on information technology: coding and computing (itcc)

作者： J. Castella-Roca G. Navarro J.A. Ortega-Ruiz J. Garcia ETSE-URV Catalonia Spain Universidad Autonoma de Barcelona Catalonia Spain

Unlike in traditional environments, e-gambling players must make a beforehand payment to start a game. Most on-line casinos currently solve this problem using prepayment systems where the on-line casino has absolute control over all the transactions among the players. However, this solution poses a great number of problems because of the necessary trust relation between players and the on-line casino managers. To reduce this strong trust relationship with the on-line casino, the authors proposed in this paper the use of a reliable digital chips system, which provides auditing facilities, and can be trusted by external parties. Digital chips, just like physical ones, will be used for players instead of legal course money. A set of cryptographic protocols will protect the different actions that players can perform using these digital chips.

关键词： Credit cards Control systems Law Legal factors Cryptographic protocols Government Protection Security Cryptography information technology

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AES power attack based on induced cache miss and countermeasure

AES power attack based on induced cache miss and countermeas...

引用

international conference on information technology: coding and computing (itcc)

作者： G. Bertoni V. Zaccaria L. Breveglieri M. Monchiero G. Palermo Advanced System Technology STMicroelectronics Agrate Milan Italy Dipartimento di Elettronica e Informazione Politecnico di Milano Milan Italy

This paper presents a new attack against a software implementation of the Advanced Encryption Standard. The attack aims at flushing elements of the SBOX from the cache, thus inducing a cache miss during the encryption phase. The power trace is then used to detect when the cache miss occurs; if the miss happens in the first round of the AES then the information can be used to recover part of the secret key. The attack has been simulated using the Wattch simulation framework and a simple software implementation of AES (using a single table for the SBOX). The attack can be easily extended to more sophisticated versions of AES with more than one table. Eventually, we present a simple countermeasure which does not require randomization.

关键词： Cryptography Delay Software standards Cache memory Energy consumption Timing information technology Computer architecture

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Stateful Inspection firewall session table processing

Stateful Inspection firewall session table processing

引用

international conference on information technology: coding and computing (itcc)

作者： Xin Li Zheng-Zhou Ji Ming-Zeng Hu School of Computer Science and Technology Harbin Institute of Technology Harbin China

ISBN: (纸本)0769523153

Stateful Inspection is a key technology to network devices such as routers and firewalls. Existed session table architectures of Stateful Inspection devices store all session information in a single entry, which causes high time cost of session table timeout processing. In this paper we present a new architecture which divides a session entry into two parts, and designs different data structures for each other. The new architecture can improve the performance of session table greatly. A new PATRICIA algorithm is proposed to organize session table, which is proved to be an optimal 2-ary trie for fixed-length match. An ASIC is implemented for the architecture and corresponding algorithms. Both theoretical and experimental results show that the new architecture has better performance than existed architectures, and can work well in Gigabit Ethernet network.

关键词： Inspection Data structures Application specific integrated circuits Computer science Computer architecture Costs Ethernet networks Filtering Security Space technology

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Fast parallel table lookups to accelerate symmetric-key cryptography

Fast parallel table lookups to accelerate symmetric-key cryp...

引用

international conference on information technology: coding and computing (itcc)

作者： A. Murat Fiskiran R.B. Lee Department of Electrical Engineering Princeton University USA

Table lookups are one of the most frequently-used operations in symmetric key ciphers. Particularly in the newer algorithms such as the advanced encryption standard (AES), we frequently find that the greatest fraction of the execution time is spent during table lookups, varying between 34% and 72% for the five representative ciphers we consider: AES, Blowfish, Twofish, MARS, and RC4. In order to accelerate and parallelize these table lookups, we describe a new parallel table lookup (ptlu) instruction. Our synthesis results indicate that such an instruction can be added to a basic RISC processor with no cycle time impact. We compare the performance of the ptlu instruction with the speedups available through more conventional architectural techniques such as multiple-issue execution. We find that the performance benefits of using the ptlu instruction can be far higher than increasing the number of instructions executed per cycle in superscalar or VLIW processors.

关键词： Acceleration Cryptography Table lookup Mars Computer aided instruction Reduced instruction set computing VLIW Communication networks IP networks Aggregates

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A classifier-based text mining approach for evaluating semantic relatedness using support vector machines

A classifier-based text mining approach for evaluating seman...

引用

international conference on information technology: coding and computing (itcc)

作者： Chung-Hong Lee Hsin-Chang Yang Department of Electrical Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan Department of Information Management Chang Jung University Tainan County Taiwan

ISBN: (纸本)0769523153

The quantification of evaluating semantic relatedness among texts has been a challenging issue that pervades much of machine learning and natural language processing. This paper presents a hybrid approach of a text-mining technique for measuring semantic relatedness among texts. In this work we develop several text classifiers using support vector machines (SVM) method to supporting acquisition of relatedness among texts. First, we utilized our developed text mining algorithms, including text mining techniques based on classification of texts in several text collections. After that, we employ various SVM classifiers to deal with evaluation of relatedness of the target documents. The results indicate that this approach can also be fitted to other research work, such as information filtering, and recategorizing resulting documents of search engine queries.

关键词： Text mining Support vector machines Support vector machine classification information filtering Search engines information filters Machine learning Feedback Internet information management

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ID-based one round authenticated group key agreement protocol with bilinear pairings

ID-based one round authenticated group key agreement protoco...

引用

international conference on information technology: coding and computing (itcc)

作者： Yijuan Shi Gongliang Chen Jianhua Li Department of Electronic Engineering Shanghai Jiaotong University Shanghai China

ISBN: (纸本)0769523153

Authenticated group key agreement is important in many modern collaborative and distributed applications. Recently, identity-based authenticated group key agreement has been increasingly researched because of the simplicity of a public key management. Basically, these protocols provide authentication by signatures. Hence they are less efficient for the verification of signatures creates additional computational overhead. In the paper, we propose an efficient authenticated group key agreement protocol by introducing a modified identity-based public key infrastructure with new system setup and key extraction algorithms. The security of our protocol is assured by the discrete logarithm assumption. Moreover, our protocol requires only one round and is more efficient than all previously known ones since it provides authentication without using signatures.

关键词： Identity-based encryption Authentication Cryptographic protocols Public key Public key cryptography Access protocols Collaboration Identity management systems Security information technology

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Enhancing focused crawling with genetic algorithms

Enhancing focused crawling with genetic algorithms

引用

international conference on information technology: coding and computing (itcc)

作者： M. Shokouhi P. Chubak Z. Raeesy School of Computer Science and IT RMIT University Melbourne Australia Department of Computer Engineering Sharif University of Technology Tehran Iran Department of Computer Engineering Bu-Ali Sina University Tehran Iran

Web crawlers are one of the most crucial components in search engines and their optimization would have a great effect on improving the searching efficiency. In this paper, we introduce an intelligent crawler called Gcrawler that uses a genetic algorithm for improving its crawling performance. Gcrawler estimates the best path for crawling on one hand and expands its initial keywords by using a genetic algorithm during the crawling on the other hand. This is the first crawler that acts intelligently without any relevance feedback or training. All the processes are online and there is no need for direct interaction with the users.

关键词： Genetic algorithms Crawlers Focusing Search engines Computer science Biomedical measurements Feedback Web sites Databases Bandwidth

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Layered MPEG video transmission over IP DiffServ

Layered MPEG video transmission over IP DiffServ

引用

international conference on information technology: coding and computing (itcc)

作者： Hong Zhao N. Ansari Y.Q. Shi College of Engineering Embrey-Riddle Aeronautical University Prescott AZ USA Advanced Networking Laboratory New Jersey Institute of Technology Newark NJ USA

Multimedia applications have become one of the major traffic to be transported through networks. These applications require high bandwidth and stringent quality of service (QoS). The end video quality is determined not only by the network QoS but also by the encoded video quality. We consider video quality from these two aspects and propose to transport spatial scalable encoded videos with different dropping priorities over DiffServ (differentiated service). Performance analysis and simulation results show that this can provision QoS guarantees. The dropping policy we propose at the egress router can reduce the traffic load as well as the risk of congestion in other domains.

关键词： Diffserv networks Quality of service Bandwidth Telecommunication traffic Video compression Videoconference Delay Performance analysis Analytical models Web and internet services

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