Jpeg/Exif Message Digest Compilation With SHA512 Hash Function

Security information method for jpeg / exif documents generally aims to prevent security attack by protecting documents with password and watermark. Both methods cannot used to determine the condition of data integrity at the detection stage of the information security cycle. Message Digest is the essence of a file that used to represent data integrity. This study aims to compile a message digest to detect changes that occur in jpeg / exif documents in information security. The research phase consists of five stages. The first stage, identification of the jpeg / exif document structure conducted using Boyer-Moore string matching algorithm to find jpeg/exif segments location. The Second stage is segment content acquisition, conducted based on segment location and length obtained. The Third step, computing message digest for each segment using SHA512 hash function. Fourth stage, jpeg / exif document modification experiments to identified affected segments. The Fifth stage is selecting and combining the hash value of the segment into message digest. Obtained result show message digest for jpeg / exif documents composed of two parts, the hash value of the SOI segment and the APP1 segment. The SOI segment value used to detect modifications for jpeg to png conversion and image editing. The APP1 hash value used to detect metadata editing. The SOF0 hash values use to detect modification for image recoloring, cropping and resizing.

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Implementation SHA512 Hash Function And Boyer-Moore String Matching Algorithm For Jpeg/exif Message Digest Compilation

Jurnal Online Informatika ◽

10.15575/join.v4i1.304 ◽

2019 ◽

Vol 4 (1) ◽

pp. 16

Author(s):

Rachmad Fitriyanto ◽

Anton Yudhana ◽

Sunardi Sunardi

Keyword(s):

Information Security ◽

Hash Function ◽

String Matching ◽

Data Integrity ◽

Matching Algorithm ◽

Document Structure ◽

Digital Fingerprint ◽

Content Acquisition ◽

Detection Stage ◽

Message Digest

Security information method for JPEG/exif documents generally aims to prevent security attacks by protecting documents with password and watermark. Both methods cannot be used to determine the condition of data integrity at the detection stage of the information security cycle. Message Digest is the essence of a file that has a function as a digital fingerprint to represent data integrity. This study aims to compile digital fingerprints to detect changes that occurred in JPEG / exif documents in information security. The research phase consists of five stages. The first stage, identification of the JPEG / exif document structure conducted using the Boyer-Moore string matching algorithm to find JPEG/exif segments location. The Second stage is segment content acquisition, conducted based on segment location and length obtained. The Third step, computing message digest for each segment using SHA512 hash function. Fourth stage, JPEG / exif document modification experiments to identified affected segments. The fifth stage is selecting and combining the hash value of the segment into the message digest. The obtained result shows the message digest for JPEG/exif documents composed of three hash values. The SOI segment hash value used to detect modifications for JPEG to png conversion and image editing. The APP1 hash value used to detect metadata editing. The SOF0 hash values use to detect modification for image recoloring, cropping and resizing — the combination from three hash values as JPEG/exif’s message digest.

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Data Integrity

10.1093/oso/9780198788003.003.0006 ◽

2017 ◽

Author(s):

Keith M. Martin

Keyword(s):

Hash Function ◽

Hash Functions ◽

Data Integrity ◽

Message Authentication ◽

Authenticated Encryption ◽

Authentication Codes ◽

Basic Model ◽

Function Design ◽

Security Properties ◽

Different Levels

This chapter discusses cryptographic mechanisms for providing data integrity. We begin by identifying different levels of data integrity that can be provided. We then look in detail at hash functions, explaining the different security properties that they have, as well as presenting several different applications of a hash function. We then look at hash function design and illustrate this by discussing the hash function SHA-3. Next, we discuss message authentication codes (MACs), presenting a basic model and discussing basic properties. We compare two different MAC constructions, CBC-MAC and HMAC. Finally, we consider different ways of using MACs together with encryption. We focus on authenticated encryption modes, and illustrate these by describing Galois Counter mode.

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An examination on data integrity auditing patterns in cloud computing

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i1.9.9822 ◽

2018 ◽

Vol 7 (1.9) ◽

pp. 200

Author(s):

T A.Mohanaprakash ◽

J Andrews

Keyword(s):

Cloud Computing ◽

Information Security ◽

Data Integrity ◽

Cloud Service ◽

New Approach ◽

Computing Services ◽

Security Challenges ◽

Cloud Server ◽

State Of Affairs ◽

Dynamic Updates

Cloud computing is associate inclusive new approach on however computing services square measure made and utilized. Cloud computing is associate accomplishment of assorted styles of services that has attracted several users in today’s state of affairs. The foremost enticing service of cloud computing is information outsourcing, because of this the information homeowners will host any size of information on the cloud server and users will access the information from cloud server once needed. A dynamic outsourced auditing theme that cannot solely defend against any dishonest entity and collision, however conjointly support verifiable dynamic updates to outsourced information. The new epitome of information outsourcing conjointly faces the new security challenges. However, users might not totally trust the cloud service suppliers (CSPs) as a result of typically they may be dishonest. It's tough to work out whether or not the CSPs meet the customer’s expectations for information security. Therefore, to with success maintain the integrity of cloud information, several auditing schemes are projected. Some existing integrity ways will solely serve for statically archived information and a few auditing techniques is used for the dynamically updated information. The analyzed numerous existing information integrity auditing schemes together with their consequences.

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ANALISIS PERBANDINGAN ALGORITMA SIMETRIS RIVEST CODE 5 DENGAN ALGORITMA SIMETRIS RIVEST CODE 6) (Studi Kasus : SMK Negeri Seluma)

Jurnal Informatika Upgris ◽

10.26877/jiu.v4i2.2840 ◽

2019 ◽

Vol 4 (2) ◽

Author(s):

Rozali Toyib ◽

Ardi Wijaya

Keyword(s):

Execution Time ◽

Hash Function ◽

Storage Media ◽

Encryption And Decryption ◽

Secure Data ◽

Computer Based ◽

Message Digest ◽

Set Up

Abstack: Data stored in storage media is often lost or opened by certain parties who are not responsible, so that it is very detrimental to the owner of the data, it is necessary to secure data so that the data can be locked so that it cannot be opened by irresponsible parties. The RC5 and RC6 algorithms are digestive massage algorithms or sometimes also known as the hash function which is an algorithm whose input is a message whose length is not certain, and produces an output message digest from its input message with exactly 128 bits in length. RC6 password is a protection for the user in securing data on a PC or computer. Based on the results of the conclusions taken: For the experiments carried out on the RC5 algorithm the execution time for the generation of keys (set-up key) is very fast, which is about 9-10 ns, a trial carried out on the RC6 algorithm execution time for the key generator (set up key ) faster than 10-11 ns. In the encryption and decryption process, the execution time depends on the size or size of the plaintext file. The larger the size of the plaintext file, the longer the execution time.Abstrak : Data yang tersimpan dalam media penyimpanan sering hilang atau dibuka oleh pihak-pihak tertentu yang tidak bertanggung jawab, sehinga merugikan sekali bagi pemilik data tersebut, untuk itu diperlukan suatu pengamanan data agar data tersebut dapat terkunci sehingga tidak dapat dibuka oleh pihak yang tidak bertanggung jawab.. Algoritma RC5 dan RC6 merupakan algoritma massage digest atau kadang juga dikenal dengan hash function yaitu suatu algoritma yang inputnya berupa sebuah pesan yang panjangnya tidak tertentu, dan menghasilkan keluaran sebuah message digest dari pesan inputnya dengan panjang tepat 128 bit. Password RC6 merupakan salah satu perlindungan kepada user dalam pengamanan data yang berada dalam sebuah Pc atau computer. Berdasarkan hasil pengujian diambil kesimpulan : Untuk uji coba yang dilakukan pada algoritma RC5 waktu eksekusi untuk pembangkitan kunci (set up key) sangat cepat sekali yaitu sekitar 9-10 ns, uji coba yang dilakukan pada algoritma RC6 waktu eksekusi untuk pembangkit kunci (set up key) lebih cepat sekali yaitu 10-11 ns, Pada proses enkripsi dan dekripsi, waktu eksekusi tergantung dari besar atau kecilnya ukuran file plaintext.s emakin besar ukuran file plaintext maka semakin lama waktu eksekusinya.

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Hash Function, Message Digest, and Message Authentication Code

Wireless Mobile Internet Security ◽

10.1002/9781118512920.ch5 ◽

2013 ◽

pp. 161-201 ◽

Cited By ~ 1

Keyword(s):

Hash Function ◽

Message Authentication ◽

Message Authentication Code ◽

Authentication Code ◽

Message Digest

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Cryptographic Hash Function

Handbook of Research on Threat Detection and Countermeasures in Network Security - Advances in Information Security, Privacy, and Ethics ◽

10.4018/978-1-4666-6583-5.ch006 ◽

2015 ◽

pp. 80-94 ◽

Cited By ~ 2

Author(s):

Imad Fakhri Alshaikhli ◽

Mohammad Abdulateef AlAhmad

Keyword(s):

Hash Function ◽

Data Integrity ◽

Cryptographic Hash Function ◽

Source Of Information

Cryptographic hash function verifies data integrity and sender identity or source of information. The task is accomplished by taking a variable bit patterns as an input then produces a fixed bit patterns of output. This chapter provides a detailed overview to include classification, properties, constructions, attacks, applications and an overview of a selected dedicated cryptographic hash function.

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Hash Functions and Their Applications

Algorithmic Strategies for Solving Complex Problems in Cryptography - Advances in Information Security, Privacy, and Ethics ◽

10.4018/978-1-5225-2915-6.ch005 ◽

2018 ◽

pp. 66-77

Author(s):

Kannan Balasubramanian

Keyword(s):

Hash Function ◽

Hash Functions ◽

Digital Signatures ◽

Message Authentication ◽

Authenticated Encryption ◽

Authentication Codes ◽

Message Authentication Codes ◽

Message Digest ◽

Cryptographic Hash Functions

Cryptographic Hash Functions are used to achieve a number of Security goals like Message Authentication, Message Integrity, and are also used to implement Digital Signatures (Non-repudiation), and Entity Authentication. This chapter discusses the construction of hash functions and the various attacks on the Hash functions. The Message Authentication Codes are similar to the Hash functions except that they require a key for producing the message digest or hash. Authenticated Encryption is a scheme that combines hashing and Encryption. The Various types of hash functions like one-way hash function, Collision Resistant hash function and Universal hash functions are also discussed in this chapter.

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Design and Analysis on a Parallel Chaos-Based Hash Function

International Journal of Bifurcation and Chaos ◽

10.1142/s0218127420501886 ◽

2020 ◽

Vol 30 (13) ◽

pp. 2050188

Author(s):

Zhuo Liu ◽

Yong Wang ◽

Gongkun Jiang ◽

Leo Yu Zhang

Keyword(s):

Hash Function ◽

High Efficiency ◽

Chaotic Map ◽

Hash Functions ◽

Data Integrity ◽

Security Requirements ◽

Computing Platform ◽

Performance Requirements ◽

Data Capacity ◽

Parallel Mode

The inherent random-like behavior and one-way property of iteration in chaotic systems provide a good basis for designing Hash function. In the era of big data, due to the increasing data capacity in applications, fast Hash functions with parallel mode are highly desirable when authenticating data integrity. We analyze the issue of how to parallelize Hash function with iterative structure. Some security requirements on parallel Hash function are presented. In addition, using chaotic map and block cipher, we construct a keyed parallel Hash function. The message blocks are firstly processed in parallel by a DM-like structure. Furthermore, a tree mode with chaotic map is utilized to combine the outputs of the hash round function in parallel. The proposed Hash function is analyzed by theory and tested by computer simulations. The test results show that the proposed scheme can resist the various common attacks against Hash functions. It satisfies the secure performance requirements of Hash function. Owing to the usage of the parallel mode to process messages, the proposed chaos-based Hash function possess high efficiency and has high potential in applications to guarantee data integrity on a parallel computing platform.

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