scholarly journals Steganography Technique and Modification of Substitution Cipher Using ASCII Code and Fibonacci Sequences

2021 ◽  
Vol 13 (2) ◽  
pp. 77
Author(s):  
Musthofa Galih Pradana ◽  
Pujo Hari Saputro ◽  
Bondan Wahyu Pamekas
Keyword(s):  
Data Security ◽  
Conversion Process ◽  
Cryptographic Algorithm ◽  
Cryptographic Algorithms ◽  
Secure Data ◽  
Ascii Code ◽  
The Media ◽  
Fibonacci Sequences ◽  
Substitution Cipher

<br /><em>Cryptography is widely used to secure data and information so that it is not easily misused by parties who are not interested in the data. One type of cryptographic algorithm is Caesar Cipher and Vigenere Cipher. Both of these algorithms are classic cryptographic algorithms that need to be modified so that they become more optimal in the data security process. The first modification is to modify the Vigenere key using Fibonacci. In general, Vigenere Cipher will repeat the same keyword to complete the number of characters that are lacking so that the number of characters is the same as the number of characters in the plaintext. The second modification is to change or convert plaintext letters into ASCII letters so that the code is more difficult to solve. After the ASCII conversion process is done, the next results will be converted back in Hexa letters. In addition to the two modifications made, the steganography technique is also added by hiding the code behind the media in the form of images. Images that are sampled will be renamed and stored in different places.</em>

PENERAPAN METODE SEGITIGA PASCAL ALJABAR UNTUK MEMAKSIMALKAN TEKNIK PENYANDIAN ALGORITMA WORD AUTO KEY ENCRYPTION (WAKE)

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Kaldius Ndruru ◽  
Putri Ramadhani
Keyword(s):  
Data Security ◽  
Important Data ◽  
Pascal Triangle ◽  
Absolute Requirement ◽  
Cryptographic Algorithms ◽  
Secure Data ◽  
Triangle Method ◽  
Symmetric Key

Security of data stored on computers is now an absolute requirement, because every data has a high enough value for the user, reader and owner of the data itself. To prevent misuse of the data by other parties, data security is needed. Data security is the protection of data in a system against unauthorized authorization, modification, or destruction. The science that explains the ways of securing data is known as cryptography, while the steps in cryptography are called critical algorithms. At this time, there are many cryptographic algorithms whose keys are weak especially the symmetric key algorithm because they only have one key, the key for encryption is the same as the decryption key so it needs to be modified so that the cryptanalysts are confused in accessing important data. The cryptographic method of Word Auto Key Encryption (WAKE) is one method that has been used to secure data where in this case the writer wants to maximize the encryption key and description of the WAKE algorithm that has been processed through key formation. One way is to apply the algebraic pascal triangle method to maximize the encryption key and description of the WAKE algorithm, utilizing the numbers contained in the columns and rows of the pascal triangle to make shifts on the encryption key and the description of the WAKE algorithm.Keywords: Cryptography, WAKE, pascal

scholarly journals IMPLEMENTASI ALGORITMA STEGANOGRAFI FIRST OF FILE DAN END OF FILE UNTUK PENYISIPAN TEXT DALAM GAMBAR

2020 ◽  
Vol 1 (2) ◽  
pp. 93-104
Author(s):  
Shabila Fitri Aulia ◽  
Siti Sauda
Keyword(s):  
Data Security ◽  
Image Size ◽  
Technological Advances ◽  
Secure Data ◽  
The Media ◽  
Review Study ◽  
To Come ◽  
The Many

Technological advances have developed rapidly nowadays. These technological advances are also in line with the development of ways of communicating both orally and in writing. In terms of writing, maintaining aspects of data security and confidentiality is very important. Many technologies can be used to secure data such as cryptography and steganography. This research will use the First of File and End of File Steganography Algorithms to secure data. Steganography is the science of hiding messages or data in the media. The First of File and End of File methods are one of the many methods commonly used in the Steganography Algorithm. Generally, the First of File and End of File methods are not much different. The First of File method inserts a message at the beginning of the file, while End Of File inserts a message at the end of the file. This technology can also be applied again for the years to come. This research produces an overview after a review study of the application of the FOF and EOF steganographic algorithms, the speed of steganography and the differences in the image after steganography in terms of image size and pixel. Kemajuan teknologi sudah sangat berkembang dengan pesat pada era sekarang. Kemajuan teknologi ini juga seiring dengan berkembangnya cara berkomunikasi baik secara lisan maupun tulisan. Dalam hal tulisan, menjaga aspek keamanan dan kerahasiaan data sangatlah penting. Banyak teknologi yang bisa dipakai untuk mengamankan data seperti kriptografi dan steganografi. Penelitian ini akan menggunakan Algoritma Steganografi First Of File dan End Of File untuk mengamankan data. Steganografi merupakan ilmu menyembunyikan pesan atau data ke dalam media. Metode First Of File dan End Of File merupakan salah satu dari banyaknya metode yang biasa digunakan pada Algoritma Steganografi.Umumnya,metodeFirst Of File dan End Of File tidak jauh berbeda. Metode First Of File akan menyisipkan pesan diawal file sedangkan End Of File akan menyisipkan pesan di akhir file. Teknologi ini juga dapat diaplikasikan kembali untuk tahun-tahun kedepannya. Penelitian ini menghasilkan gambaran setalah studi review penerapan algoritma steganografi FOF dan EOF , kecepatan steganografi dan juga perbedaan gambar setelah di steganografi dalam hal ukuran dan pixel gambar.

scholarly journals Data Security with International Data Encryption Algorithm

2017 ◽  
Author(s):  
Robbi Rahim ◽  
Mesran Mesran ◽  
Andysah Putera Utama Siahaan
Keyword(s):  
Information Security ◽  
Data Security ◽  
Data Encryption ◽  
Encryption Algorithm ◽  
Cryptographic Algorithms ◽  
Secure Data ◽  
International Data

Information security is very important nowadays, how to secure data certainly requires a technique one of which is the use of cryptography, IDEA algorithm is one of cryptographic algorithms that can be used to secure the message, and in this research IDEA algorithm process is displayed gradually to facilitate the development of IDEA algorithm in various purposes

scholarly journals Perancangan Teknik Kriptografi Block Cipher Berbasis Pola Permainan Tradisional Rangku Alu

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Perdana Bagas Tirta Kumbara ◽  
Magdalena A. Ineke Pakereng
Keyword(s):  
Information Technology ◽  
Data Security ◽  
Block Cipher ◽  
The World ◽  
Cryptographic Algorithms ◽  
Secure Data ◽  
Cryptographic Techniques ◽  
Traditional Game

Data security is one of the most important factors in the world of Information Technology today. One way to secure data is by Block Cipher Cryptography technique. However, some cryptographic techniques have been successfully solved by the cryptanalysis so that new cryptographic algorithms need to be created. The design of Cryptography algorithms based on traditional game patterns of Rangku Alu from East Nusa Tenggara is a design of Cryptographic Block Cipher algorithms that operate in the form of bits designed with 10 rounds where each cycle contains four processes. In each round there are four patterns for the plaintext process and four patterns for the key. The fourth process is transformed with an S-Box table to get a more random ciphertext. Tests were also carried out using Avalance Effect which reached 49,38% and the correlation value where there was a change in character reached 73,44%. So the result designing Cryptographic algorithms can be used for encryption and description in text files.

scholarly journals A Survey of Different Steganography Technique using Cryptographic Algorithm

2018 ◽  
Vol 7 (2) ◽  
pp. 40-43
Author(s):  
Prakhar Agrawal ◽  
Arvind Upadhyay
Keyword(s):  
Data Security ◽  
Image Steganography ◽  
The Other ◽  
Sensitive Information ◽  
Hidden Information ◽  
Cipher Text ◽  
Other Hand ◽  
Cryptographic Algorithm ◽  
Secure Data ◽  
Hide Data

Steganography and cryptography are two major aspects of data security . In this paper we are going to provide the survey of different techniques of LSB based Steganography that used cryptography algorithms to secure sensitive information. Steganography is used to hide data and Cryptography is used to encrypt the data. Although cryptography and steganography individually can provide data security, every of them has a drawback. Drawback associated with Cryptography is that, the cipher text looks meaningless, so the unintended user can interrupt the transmission or make more careful checks on the information from the sender to the receiver. Drawback associated with Steganography is that when the presence of hidden information is revealed or even suspected, the message is become known[1].By combining these two methods we can solve both of the above problem. First we encrypt the data using any cryptography technique and then embed the encrypted text into the image. Steganography is the process which hides the presence of secure data during communication. On the other hand cryptography is encrypting and decrypting of secure data and information with a secrete key so that no one can be understand the message directly.

scholarly journals Implementation Combination Cryptographic Algorithm Triangle Chain Cipher and Vigenere Cipher In Securing Data in Database

SinkrOn ◽  
2022 ◽  
Vol 7 (1) ◽  
pp. 100-110
Author(s):  
Ahmad Arif ◽  
Adidtya Perdana ◽  
Arief Budiman
Keyword(s):  
Data Storage ◽  
Data Security ◽  
Original Data ◽  
Cryptographic Algorithm ◽  
Secure Data ◽  
Cryptographic System ◽  
Data Theft ◽  
Encrypted Database

Data security is most important today, because the rampant data theft resulting in a lot of misuse of data by irresponsible parties so that it makes us anxious as data owners, for data storage it is usually stored in the database. From these problems the idea emerged to create a cryptographic system where the system can secure data by encrypting and decrypting also make data fully save and then the data owned by the user. This study aims to secure the data in the database by encrypting the original data without destroying the original data when later after decrypted. To perform this security, a cryptographic methodology is used with both of  method that is Vigenere Cipher and Triangle Chain Cipher algorithms which are implemented in the application because both of methodology have same root that is classical cryptographic. This application will later be used as a medium for users to secure their data in the database so that later data theft will not to be easy. After doing fully research that produces applications that can implement combination of Vigenere Cipher and Triangle Chain Cipher algorithms,data in the encrypted database field is safe because encryption has been done to the data.

scholarly journals Modified Playfair Cipher Using Random Key Linear Congruent Method

2017 ◽  
Author(s):  
Andysah Putera Utama Siahaan ◽  
Mesran Mesran ◽  
Robbi Rahim ◽  
Muhammad Syahrizal ◽  
Surya Darma Nasution
Keyword(s):  
Short Message Service ◽  
Short Message ◽  
Text Data ◽  
Cryptographic Algorithm ◽  
Cryptographic Algorithms ◽  
Secure Data ◽  
Message Service

The number of crimes that arise due to data does not have good security makes many users choose one or more cryptographic algorithms to secure data. The application of cryptographic algorithms is widely used such as to secure text data, secure messages on short message service (SMS), secure messages on chat applications, secure records on the database. Many modifications were made to obtain safer algorithms and in this study Playfair cipher which is a classical cryptographic algorithm modified by changing the key consisting of 25 characters to 255 characters and the key used to encode resulting from randomization using a linear congruent method. The result obtained is that the encoded text is hard to know and the key used is random, making it difficult to solve by cryptanalyst.

scholarly journals Data Security using 128-bit Advanced Encryption Standard Algorithm

2018 ◽  
Author(s):  
Andysah Putera Utama Siahaan ◽  
Virdyra Tasril
Keyword(s):  
Data Security ◽  
Advanced Encryption Standard ◽  
Original Form ◽  
Standard Algorithm ◽  
Aes Algorithm ◽  
Cryptographic Algorithm ◽  
Technological Advances ◽  
Secure Data ◽  
The Right ◽  
The Way

The development of computer and telecommunications technology has experienced the significant change inprogress. It can be seen that technology has become a necessity because technological advances can accomplishtasks quickly, accurately, and efficiently. In line with the development of these technologies, it increasinglychanges the way people communicate. There needs to be security protection to protect data from the threat ofwild parties. Cryptography is the right method to secure data. One method that can be used is the AdvancedEncryption Standard (AES). This method is an excellent classical cryptographic algorithm that can be used toidentify data. AES algorithm is a symmetric ciphertext block that can encrypt and decrypt information quickly.Encryption changes data that can no longer be read called ciphertext; instead, decryption is changing theciphertext data into the original form that we know as plaintext. The AES algorithm has several key modelssuch as 128, 192, and 256 bits to encrypt and decrypt data on 128-bit message blocks. This study uses a 128-bitkey. AES encryption results can be trusted as one of the fast and powerful encryption methods.

A Novel Simplified AES Algorithm for Lightweight Real-Time Applications: Testing and Discussion

2020 ◽  
Vol 13 (3) ◽  
pp. 435-445 ◽  
Author(s):  
Malik Qasaimeh ◽  
Raad S. Al-Qassas ◽  
Fida Mohammad ◽  
Shadi Aljawarneh
Keyword(s):  
Processing Time ◽  
Block Size ◽  
Statistical Test ◽  
Mathematical Proofs ◽  
The Past ◽  
Aes Algorithm ◽  
Cryptographic Algorithm ◽  
Cryptographic Algorithms ◽  
Compare And Contrast ◽  
Constrained Devices

Background: Lightweight cryptographic algorithms have been the focus of many researchers in the past few years. This has been inspired by the potential developments of lightweight constrained devices and their applications. These algorithms are intended to overcome the limitations of traditional cryptographic algorithms in terms of exaction time, complex computation and energy requirements. Methods: This paper proposes LAES, a lightweight and simplified cryptographic algorithm for constricted environments. It operates on GF(24), with a block size of 64 bits and a key size of 80-bit. While this simplified AES algorithm is impressive in terms of processing time and randomness levels. The fundamental architecture of LAES is expounded using mathematical proofs to compare and contrast it with a variant lightweight algorithm, PRESENT, in terms of efficiency and randomness level. Results: Three metrics were used for evaluating LAES according to the NIST cryptographic applications statistical test suite. The testing indicated competitive processing time and randomness level of LAES compared to PRESENT. Conclusion: The study demonstrates that LAES achieves comparable results to PRESENT in terms of randomness levels and generally outperform PRESENT in terms of processing time.

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