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Improved Duplicate Record Detection Using ascii code Q-gram Indexing Technique

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2018年第12期43卷 7409-7420页

作者： Elziky, Mayada A. Ibrahim, Dina M. Sarhan, Amany M. Tanta Univ Fac Engn Dept Comp & Control Engn Tanta Egypt

With the aim of reducing duplicate records in databases, duplicate record detection (DRD) ensures the integrity of data. Its role is to identify records signifying same entities either in the same or in different compared to database. A diversity of indexing techniques has been proposed to support DRD. Q-gram is one of the common techniques used to index databases. This paper introduces modification to the Q-gram indexing technique. Such modification participates in improving the performance of the duplicate detection process and in reducing the time and number of comparisons. In the proposed work, in order to make the back-end computations easier, Q-gram strings are alternatively converted into numeric values using their corresponding ascii code. Based on these numeric values, the indexing will decrease the complexity of Q-gram comparisons and speed up the DRD process as a whole. Unlike the existing approaches, the proposed technique is easier in implementation and requires less memory space. Two other variations of the proposed technique are introduced in this paper to decrease the matching process time;the first uses a range for matching, while the second sorts words alphabetically inside blocks. According to experimental results, the three proposed techniques perform much faster and are almost as accurate as the current Q-gram technique, meaning that they can be used in large-sized databases DRD.

关键词： Duplicate record detection Q-gram Indexing technique BKV ascii code

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HRJ_Encryption: An ascii code Based Encryption Algorithm and its Implementation 2

HRJ_Encryption: An ASCII Code Based Encryption Algorithm and...

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2nd International Conference on Computing for Sustainable Global Development (INDIACom)

作者： Sharma, Hitesh Kumar Tomar, Ravi Patni, J. C. Univ Petr & Energy Studies Ctr Informat Technol Dehra Dun India

ISBN: (纸本)9789380544168

The transmission of data over a common transmission media revolute the world of information sharing from personal desktop to cloud computing. But the risk of the information theft has increased in the same ratio by the third party working on the same channel. The risk can be avoided using the suitable encryption algorithm. Using the best suited algorithm the transmitted data will be encrypted before placing it on the common channel. Using the public key or the private key the encrypted data can be decrypted by the authenticated user. It will avoid the risk of information theft by the unauthenticated user. In this work we have proposed an encryption algorithm which uses the ascii code to encrypt the plain text. The common key will he used by sender or receiver to encrypt and decrypt the text for secure communication.

关键词： Plain Text Cipher Text Encryption Decryption ascii code Secret Key

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An Encoding Table Corresponding to ascii codes for DNA Data Storage and a New Error Correction Method HMSA

IEEE TRANSACTIONS ON NANOBIOSCIENCE

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IEEE TRANSACTIONS ON NANOBIOSCIENCE 2024年第2期23卷 344-354页

作者： Zhang, Xuncai Zhou, Fuzhen Zhengzhou Univ Light Ind Coll Elect & Informat Engn Zhengzhou 450002 Peoples R China

DNA storage stands out from other storage media due to its high capacity, eco-friendliness, long lifespan, high stability, low energy consumption, and low data maintenance costs. To standardize the DNA encoding system, maintain consistency in character representation and transmission, and link binary, base, and character together, this paper combines the encoding method with ascii code to construct an ascii-DNA encoding table. The encoding method can encode not only pure text information but also audio and video information and satisfies the GC content constraint and the homopolymer constraint, with the encoding density reaching 1.4 bits/nt. In particular, when encoding textual information, it directly skips the binary conversion process, which reduces the complexity of encoding, and increasing the encoding density to 1.6 bits/nt. In order to solve the problem of errors in sequences, under the influence of heuristic algorithms, this paper proposes a new error correction method (HMSA) by combining minimum Hamming distance, multiple sequence alignment, and encoding scheme. It can correct not only substitution, insertion, and deletion errors in Reads but also consecutive errors in Reads. It greatly improves the utilization of the Reads and avoids the waste of resources. Simulation results show that the recovery rate of Reads increases with the increasing number of sequencing times. When the number of erroneous bases in a 150nt sequence reaches 5nt, the error correction rate can exceed 96% by sequencing the base sequence only 10 times regardless of whether the errors are consecutive or not. Additionally, the HMSA error correction method is applicable to all coding schemes for lookup code table types.

关键词： DNA storage ascii code encoding table Hamming distance HMSA

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COMBINED BINARY code TRANSLATION AND PARALLEL-TO-SERIAL CONVERSION USING STORED LOGIC-ARRAYS

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IEEE TRANSACTIONS ON COMPUTERS 1978年第9期27卷 833-841页

作者： ITO, MR CAMERON, RD Department of Electrical Engineering University of British Columbia

Two general classes of machines for performing code translation and serialization are considered;namely Translate-Table and State machines. The Translate-Table machine is a conventional two-stage machine comprising a translation stage folowed by a serialization stage. Two kinds of State machines are examined: 1) counter-driven and 2) microprogrammed.

关键词： ascii code Morse code code converter code tree microprogrammed machine programmed logic array (PLA) read-only memory (ROM) sequential machine

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Text information hiding method based on chaotic map and BCH code in DWT domain of a carrier image

Text information hiding method based on chaotic map and BCH ...

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5th International Conference on Wavelet Analysis and Pattern Recognition

作者： Yang, Shu-Guo Li, Chun-Xia Sun, Sheng-He Qingdao Univ Sci & Technol Qingdao 266061 ShanDong Peoples R China Harbin Inst Technol Harbin Peoples R China

ISBN: (纸本)9781424410651

The issue of Information security in the transmitting process becomes more and more urgent with the development of the network technology and the information technology. A novel scheme for text information hiding is proposed in the paper. We do Many works to text information before embedding them into a carrier image. Firstly, we encode the characters of the text information by ASCH code and receive plaintext information codes. Secondly, we encrypt the plaintext information codes by chaotic encryption method and receive encrypted information codes. Then we encode the encrypted information codes by BCH code again before we transmit them, and embed the ciphertext information into the selected wavelet coefficients of a carrier image in DWT. Finally, we do many experiments to Prove our scheme to be secure and robust.

关键词： text information chaotic map ascii code BCH code DWT

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Malicious Http Request Detection Using code-Level Convolutional Neural Network 15th

Malicious Http Request Detection Using Code-Level Convolutio...

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15th International Conference on Risks and Security of Internet and Systems (CRiSIS)

作者： Jemal, Ines Haddar, Mohamed Amine Cheikhrouhou, Omar Mahfoudhi, Adel Univ Sfax ENIS CES LR11ES49 Sfax 3038 Tunisia Univ Sfax ReDCAD Lab Sfax Tunisia Taif Univ Coll Comp & Informat Technol Taif Saudi Arabia

ISBN: (纸本)9783030688875;9783030688868

Http requests represent the main component of a web navigation system. These requests, once received by the server, need to be analyzed to guarantee that they are attack-free. Attacks carried by Http requests can have disastrous effects. Due to the importance of Http requests, it is crucial to design an efficient and robust Http request analyzer that guarantees the detection of malicious ones and prevent them from being processed. In this paper, we propose a new technique to process the Http request called code Embedding. The proposed method was integrated within the Convolutional neural network to provide an efficient and robust web attack detection tool. The experimental results prove that our method outperforms the previous works and reaches an accuracy of 98.125%.

关键词： Web security Web attacks Convolutional neural network ascii code

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Relating the technique of code presentation to the k-map method in the design of code converters

Relating the technique of code presentation to the k-map met...

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3rd International Conference on Computing, Communications and Control Technologies

作者： Oluwade, Dele Dewade Res & Sci Clin Ibadan Oyo State Nigeria

ISBN: (纸本)9789806560482

The k-map method is a powerful tool in digital electronics for the simplification or minimization of Boolean expressions. The expressions in themselves arise as a result of Boolean algebra - a simple but important mathematical technique useful in describing the internal workings of digital systems. In this paper, the author discusses a novel mathematical technique compatible with the internal representation of data. This algebraic technique, called "code presentation", is an imitation of the concept of "group presentation" in abstract algebra which enables a specified set to be written in a simple and compact form. code presentation is then related to the k-map method with respect to the design of code converters. Specific example considered is the conversion of the numerics of a 7-bit subset of the Information Processing code (IPC) to the numerics of the 7-bit American Standard code for Information Interchange (ascii). The design of code converters is thus looked at from a novel perspective.

关键词： k-map code converter code presentation Boolean algebra IPC code ascii code

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A bio-inspired algorithm for enhancing DNA cryptography

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INTERNATIONAL JOURNAL OF INFORMATION AND COMPUTER SECURITY 2023年第3-4期21卷 436-456页

作者： Lakel, Kheira Bendella, Fatima Fac Arab Language & Literature Higher Normal Sch Bouzareah Dept Language & Literature Bouzareah Algeria Univ Sci & Technol Oran USTO SIMPA Lab Oran Algeria Univ Sci & Technol Oran USTO Fac Math & Informat Dept Comp Sci Oran Algeria

In this era, information security plays a crucial and sensitive task as this data is potentially vulnerable such that different types of attacks may happen and affects the data. This paper presents a new hybrid cryptosystem for DNA cryptography based on GA and a coding table. The encryption algorithm provides multi-layer security (jamming with spiral matrix, generating coding table, coding of DNA characters, XOR-crossover operation) for DNA sequence. The decryption algorithm follows these steps: binary and segment the ciphertext, applied XOR-crossover operation, Transform each block to ascii code, decoding of characters, remove jamming and generate the plaintext. The performance evaluation of this algorithm is based on confusion and diffusion, avalanche effect, and encryption time. The experimental results show that these algorithms yield an average time 0.835 ms/0.78 ms for 1,000 bases. The result shows outperformance in security and a weak correlation coefficient between ciphertexts generated and plaintext.

关键词： information security DNA encryption decryption cryptography one time pad ascii code jamming scrambling coding table spiral matrix XOR-crossover operation

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All optical read only memory with frequency encoded addressing technique

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OPTIK 2011年第16期122卷 1437-1440页

作者： Mukherjee, Kousik BB Coll Dept Phys Asansol 713303 W Bengal India

A semiconductor amplifier (SOA) based all optical read only memory (ROM) is proposed and discussed using non linear polarization rotation. The ROM based on 2-4 line decoder is based on frequency encoded addressing technique, which has several advantages over other encoding techniques. The SOA has sufficiently high switching speed with property of efficient ON/OFF contrast ratio, which makes it attractive for all optical processors in computation and communication. The author has discussed the addressing and storing of the characters of American standard code for exchange of information. (C) 2010 Elsevier GmbH. All rights reserved.

关键词： Semiconductor optical amplifier Read only memory Frequency encoded addressing ascii code Decoder

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A Novel Blur Reduction Technique For QR And ascii Coding In Smartphone Visible Light Communications 13

A Novel Blur Reduction Technique For QR And ASCII Coding In ...

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13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)

作者： Yokar, Vaigai Nayaki Hoa-le-minh Ghassemlooy, Fary Woo, Wai Lok Northumbria Univ Math Phys & Elect Engn Newcastle Upon Tyne Tyne & Wear England Northumbria Univ Comp & Informat Sci Newcastle Upon Tyne Tyne & Wear England

ISBN: (数字)9781665410441

ISBN: (纸本)9781665410441

In this paper we present a new scheme to enhance the quick response (QR) code and American Standard code for information interchange (ascii) in Smartphone-to-Smartphone Visible Light Communications (S2SVLC). The key technique is to avoid the repeated scanning of the blurred QR/ascii code at the receiver. The technique will help to increase the QR/ascii detection efficiency and the system data rate. The proposed technique includes converting the RGB image into the grayscale, applying contrast enhancement, scaling and binarizing the image. The experiment includes practical data acquisition and further processing in MATLAB. The obtained result indicates that, in the proposed technique the recovery rate can reach to 96%. We have carried out an end-to-end transmission of the system.

关键词： QR code ascii code contrast enhancement blurred image enhanced image VLC smartphone

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