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检索条件"主题词=encryption algorithm"

共 295 条记录，以下是211-220 订阅

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Semi-Fragile Watermarking for Image Tamper Localization and Self-Recovery

Semi-Fragile Watermarking for Image Tamper Localization and ...

引用

IEEE International Conference on Security, Pattern Analysis, and Cybernetics (SPAC)

作者： Li, Yuhang Du, Ling Shenyang Aerosp Univ Informat Network Ctr Shenyang 110136 Peoples R China Shenyang Aerosp Univ Sch Comp Tianjin 110136 Peoples R China

ISBN: (纸本)9781479953530

This paper proposes a semi-fragile digital watermarking scheme for image tamper localization and self-recovery. Firstly, the authentication watermark is generated for tampered area localization. After that, for content recovery, the recovery watermark is calculated from high frequency band with redundancy free. Then, for the two type of watermarks, the DWT-based watermark embedding method makes our proposed scheme tolerable against friendly manipulations. Even some parts of the watermarked image are tampered and the corresponding embedded information are missing, we can still recover the image from the untouched area based on the localization results and compressive sensing. Moreover, the encryption algorithm based on chaotic function guarantees the safety of our two type of watermarks. Extensive experiments demonstrate the effectiveness of the proposed scheme, which is sensitive against malicious tamper and robust to some incidental manipulations (e.g. JPEG compression, slight noise addition, brightness/contract adjustment and format conversion).

关键词： Authentication encryption PSNR Robustness Vectors Watermarking Watermarking Peak signal-to-noise ratio cryptography Authentication self-recovery Imagery (Psychotherapy) images Robustness high-frequency band format conversion Image encryption algorithm

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AuthROS: Secure Data Sharing Among Robot Operating Systems based on Ethereum 22

AuthROS: Secure Data Sharing Among Robot Operating Systems b...

引用

22nd IEEE International Conference on Software Quality, Reliability and Security (QRS)

作者： Zhang, Shenhui Li, Wenkai Li, Xiaoqi Liu, Boyi Hainan Univ Key Lab Internet Informat Retrieval Hainan Prov Haikou Hainan Peoples R China Hong Kong Univ Sci & Technol Inst Robot Hong Kong Peoples R China

ISBN: (纸本)9781665477048

The Robot Operating System (ROS) streamlines human processes, increasing the efficiency of various production tasks. However, the security of data transfer operations in ROS is still in its immaturity. Securing data exchange between several robots is a significant problem. This paper proposes AuthROS, an Ethereum blockchain-based secure data sharing method, for robot communication. It is a ROS node authorization system capable of ensuring the immutability and security of private data flow between ROS nodes of any size. To ensure data security, AuthROS employs the smart contract for permission granting and identification, SM2-based key exchange, and SM4based plaintext encryption techniques. In addition, we deploy a data digest upload technique to optimize data query and upload performance. Finally, the experimental findings reveal that AuthROS has strong security, time performance, and node forging in cases where data should be recorded and robots need to remain immobile.

关键词： ROS Blockchain encryption algorithm

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A Scheme of E-Commerce Security based on ECC & SSL, Protocol

A Scheme of E-Commerce Security based on ECC & SSL, Protocol

引用

1st International Symposium on Computer Network and Multimedia Technology

作者： Ren, Zhikao Liu, Minghua Ye, Chen Wang, Chuansheng Qingdao Univ Sci & Technol Coll Informat Qingdao Peoples R China Qingdao Univ Sci & Technol Coll Elect Engn Qingdao Peoples R China

ISBN: (纸本)9781424452729

Considering the inefficiency of using traditional RSA algorithm in SSL protocol at E-Business area, a new E-commerce security scheme which the ECC is embed into SSL Protocol has been put forward, and the test has been carried out based on the OpenSSL source codes. The result of the test indicates that the security and efficiency of E-Business can be improved by adopting the new schemes.

关键词： Elliptic curve SSL(Secure Sockets Layer) Secure protocol encryption algorithm E-Business

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CONFIGURATION OF DNS SERVER WITH CRYPTOGRAPHIC algorithm FOR SECURE DNS AND DHCP UPDATES

CONFIGURATION OF DNS SERVER WITH CRYPTOGRAPHIC ALGORITHM FOR...

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3rd International Conference on Computing Communication and Networking Technologies (ICCCNT)

作者： Chatterjee, Tanmay ABV IIITM Gwalior ABV IIITM Informat Technol Gwalior India

ISBN: (纸本)9781467356930

As we know the Domain Name System (DNS) is one of the most successful and critical part of the internet infrastructure today. Of the many network protocols we use in networking today, it is one of the most fundamental. Yet there are a number of potential problems where there is a need for additional mechanisms and security. One of such problems is securing the DNS dynamic update when combined with DNSSEC. This paper is topropose developing techniques for enhancing the security of DNS dynamic updates as well as the Dynamic Host Configuration Protocol (DHCP) updates by using Berkley Internet Name Domain (BIND) version 9.8.1 and configuring it with cryptographic hash algorithm so that every time an update is made to the zone to add a record, it is done using a private security key.

关键词： DHCP encryption algorithm domain name server Network protocols critical parts

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The DES algorithm Based on DSP Technology

The DES Algorithm Based on DSP Technology

引用

2nd International Conference on Frontiers of Mechanical Engineering and Materials Engineering (MEME 2013)

作者： Hao, Wang Ren, Chen Dian Shasha Changchun Univ Sci & Technol Changchun Jilin Peoples R China

ISBN: (纸本)9783037859247

this paper designed a kind of DES algorithm implementation based on DSP technology, application of TI company C54x series general DSP implementation mechanisms, with the introduction of DSP, this paper proposes a new DES algorithm implementation approaches, and the implementation scheme is presented. The method is simple and practical, the hardware resources is relatively less, high transmission efficiency, suitable for low data rate data encryption of small wireless data transmission system, can be widely used in various kinds of terminal positioning and small digital wireless receiving system.

关键词： DES DSP encryption algorithm

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Discussion of one new symmetric algorithm

Discussion of one new symmetric algorithm

引用

International Multiconference of Engineers and Computer Scientists

作者： Chan, Xiaorui Liu, Guangzhong Shanghai Maritime Univ Coll Informat Engn Shanghai Peoples R China

ISBN: (纸本)9789889867140

We have devised one now kind of 160 bits symmetric encryption algorithms, basing on a kernel encryption function called S. By incising 160 bits data block into eight pieces, S function produces one brand-new 160 bits ciphertext after continuous Iteration, encryption, and combination. From computer results, we have found that: without increasing the time complexity, the new algorithm improves the security better comparing with DES and IDEA algorithms.

关键词： encryption algorithm symmetric algorithm time complexity

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A Generic Construction of Identity-Based Online/Offline Signcryption

A Generic Construction of Identity-Based Online/Offline Sign...

引用

IEEE International Symposium on Parallel and Distributed Processing with Applications

作者： Sun, Dongdong Mu, Yi Susilo, Willy Univ Wollongong Sch Comp Sci & Software Engn Wollongong NSW 2522 Australia

ISBN: (纸本)9780769534718

Signcryption has clear advantage over traditional sign-then-encrypt schemes. However, the computational overhead for signcryption is still too heavy when it is applied to resource-constraint systems. In this paper, we propose a generic construction of the identity-based online/offline signcryption, where most of computations are carried out when the associated message is still unavailable and the online part of our scheme does not require any exponent computations and therefore is very efficient. Our scheme is generic and identity-based, in the sense it is independent of the selection of signature and encryption algorithms. Our scheme possesses the properties of ciphertext indistinguishability (IND-gCCA2) and existentially unforgeability (UF-CMA).

关键词： Generic ID-based Online/Offline Signcryption encryption algorithm Scheme Generic Drugs Ciphertext Not Available

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Secure and Efficient LBIST for Feedback Shift Register-Based Cryptographic Systems

Secure and Efficient LBIST for Feedback Shift Register-Based...

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19th IEEE European Test Symposium (ETS)

作者： Dubrova, Elena Naslund, Mats Selander, Goran Royal Inst Technol S-16440 Stockholm Sweden Ericsson Res S-16480 Stockholm Sweden

ISBN: (纸本)9781479934157

Cryptographic methods are used to protect confidential information against unauthorised modification or disclosure. Cryptographic algorithms providing high assurance exist, e.g. AES. However, many open problems related to assuring security of a hardware implementation of a cryptographic algorithm remain. Security of a hardware implementation can be compromised by a random fault or a deliberate attack. The traditional testing methods are good at detecting random faults, but they do not provide adequate protection against malicious alterations of a circuit known as hardware Trojans. For example, a recent attack on Intel's Ivy Bridge processor demonstrated that the traditional Logic Built-In Self-Test (LBIST) may fail even the simple case of stuck-at fault type of Trojans. In this paper, we present a novel LBIST method for Feedback Shift Register (FSR)-based cryptographic systems which can detect such Trojans. The specific properties of FSR-based cryptographic systems allow us to reach 100% single stuck-at fault coverage with a small set of deterministic tests. The test execution time of the proposed method is at least two orders of magnitude shorter than the one of the pseudo-random pattern-based LBIST. Our results enable an efficient protection of FSR-based cryptographic systems from random and malicious stuck-at faults.

关键词： cryptographic system Feedback Shift Register encryption algorithm Secure Stuck at faults Confidential Information Computer hardware Invasive software

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Randomness Extraction Techniques for Jittery Oscillators 38

Randomness Extraction Techniques for Jittery Oscillators

引用

38th International Spring Seminar on Electronics Technology (ISSE)

作者： Marghescu, Andrei Svasta, Paul Simion, Emil Univ Politehn Bucuresti Bucharest Romania CETTI Bucharest Romania Adv Technol Inst Bucharest Romania

ISBN: (纸本)9781479988600

Random numbers represent one of the most sensitive parts of cryptography, being used in different encryption algorithms and/or communication protocols for their property of being irreversible and non-deterministic. Usually, for an attacker, it is almost impossible to break by brute force the encryption algorithm of a secure communication. This is why they focus on breaking some of the consisting components, such as the Random Number Generator (RNG). The basic property of a RNG is that its output depends just on a physical phenomenon and not on anything else (like a previous state). Using a poor RNG (a deterministic one) can lead to communication compromising. A RNG is basically based on a physical phenomenon that cannot be controlled like the jitter from oscillators. This paper describes analyses and demonstrates the techniques that can be used for extracting randomness from jittery oscillators.

关键词： encryption algorithm Physical Phenomena Jittery Random Number Generators Oscillators random numbers Communication system security Communication protocols cryptography Jitter

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Laying a Secure Foundation for Mobile Devices 20

Laying a Secure Foundation for Mobile Devices

引用

20th Annual Network and Distributed System Security Symposium, NDSS 2013

作者： Smalley, Stephen Trusted Systems Research National Security Agency

Conduct and sponsor research to provide information assurance for national security systems. Enabling safe operation in risky or compromised environments. Research into cryptographic algorithms and protocols, system analysis and design methods, trust mechanisms, and systems behavior. Creators of SE Linux, Xen Security Modules, Linux Kernel Integrity Monitor, and SE Android.

关键词： Mobile devices National Security Systems Safe handling Linux computer information security encryption algorithm Secure Accidents,emergencies and safety System analyses Methyltestosterone Androids design approach System design

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