Vigenere Cipher Research Articles

Implementasi Kriptografi Vigenere Cipher untuk Keamanan Data Informasi Desa

Data security on village information is a very important issue because it contains a lot of village information data. Important data cannot be denied that data can be edited or changed by unauthorized persons. So the data becomes insecure. Therefore, a technique is needed to secure data, namely using the classic Vigenere cipher cryptography technique, to maintain the security and confidentiality of messages or information so that it cannot be read by anyone, a desktop-based application is designed using the Java programming language which is carried out on the Netbeans IDE software to implementing the vigenere cipher algorithm as a technique for securing village information.

Membangun Super Enkripsi untuk Mengamankan Pesan

The issue of message security or an information is very important. A science that studies about securing the confidentiality of messages using passwords is called cryptography. To enhance security, two algorithms are combined to secure messages. Super encryption is a concept that uses a combination of two or more substitution and permutation (transposition) cryptography techniques to obtain an algorithm that is more difficult to crack. The first thing to do is to encrypt the message using a substitution technique (Cipher Substitution), then re-encrypt it using a permutation technique (Cipher Transposition). In this study, two cryptographic algorithms will be combined to build super encryption using the Vigenere Cipher and Bifid Cipher algorithms to secure messages. The message encryption process is using the Vigenere Cipher algorithm for the first encryption process, then continued using the Bifid Cipher algorithm for the second encryption process. The encryption process is done the other way around, starting from the back of the encryption process. The combination of these two algorithms results in more secure message security.

DEVELOPMENT OF HYBRID ENCRYPTION METHOD USING AFFINE CIPHER, VIGENERE CIPHER, AND ELGAMAL ALGORITHM TO SECURE TEXT MESSAGES IN DATA COMMUNICATION SYSTEM

With the development of technological advances in this day and age, it definitely requires a security system on messages and data. The way to maintain the security of data, messages or information requires a branch of science in its application, one of which is the algorithm or cryptography method. In its application, it requires more than one stage of the security process, because data security can be done by combining methods in its security techniques. This research aims to develop encryption methods using Affine Cipher, Vigenere Cipher, and ElGamal Algorithm to secure text messages. Affine cipher, Vigenere cipher and ElGamal are cryptography that can encrypt and decrypt text messages. Encryption is changing the message or plaintext into an unreadable message or ciphertext, on the other hand, decryption changes the ciphertext or message that initially cannot be read into a message that can be read or plaintext back in its original form. The result of this research is the development stage by doing three encryption and decryption processes. For the first encryption process using Affine Chiper which produces the initial ciphertext, then re-encrypted using Vigenere Cipher, then the previous encryption results are carried out ElGamal encryption which produces the final ciphertext. Conversely, the decryption process is first on ElGamal, then Vigenere Cipher, and finally Affine Cipher whose decryption results in plaintext back in the form of the initial text message. So that by developing and combining three algorithm methods can increase the security of information and text messages.

Algoritma Caesar Cipher atau Vigenere Cipher pada Pengenkripsian Pesan Teks

Cryptography is a science that studies information security on data with the aim of preventing other people from wanting to know its contents, by using certain codes and rules and other methods so that only authorized people can see the contents of the code. By creating an application which uses the Java programming language with NetBeans to maintain the security of text input information sent by someone so that it is not easy to read, confidential text. The caesar algorithm is a classic substitution-based cipher system that is simple in encryption and decryption of a caesar cipher system using shift operations. The Vigenere Cipher algorithm is a classic cryptographic algorithm that utilizes the vigenere square principle to perform encryption.

Pengamanan Pesan Rahasia dengan Algoritma Vigenere Cipher Menggunakan PHP

A message security system to maintain the confidentiality of data information is very important. To achieve this, a security system is required to maintain the confidentiality of information. Encrypting information sent for cryptographic purposes confidentiality, integrity, authentication and irrefutable proof is one of the methods used for this purpose. Algorithm is a collection of problem-solving commands. Algorithm also has a process of repetition (iteration) and decisions that cannot be made. Vigenere cipher is one of the traditional cryptographic algorithms with multiple alphabetical substitution. PHP stands for PHP Hypertext Preprocessor. PHP is a scripting language that is commonly used to create dynamic web applications by deploying them on servers. The purpose of this research is to secure secret messages using the Vigenere Cipher algorithm using PHP.

Penerapan Kriptografi Vigenere Cipher Pada Kekuatan Kata Sandi

One of the methods of securing information systems that is commonly known by many people is passwords. Without realizing it, passwords have an important role in securing information that is confidential. In some applications related to software, such as cellphones, ATM cards, and others. There is also a security system that functions similarly to a password. commonly known as a PIN Code. Although it only consists of numbers, its use is the same as a password, which is to secure information. The stored information is usually digital or database-based. Password security aims to secure a password stored in the database, the password needs to be secured because if the password is known by unauthorized parties or who are not entitled then important and other data will be stolen. The password that is secured is a password that is used daily, be it email passwords, social media, databases, operating systems on the device and others into the database. vigenere cipher algorithm to encode the password in a database. The result of this test is that password security is carried out based on the vigenere cipher method using a visual studio application and utilizing a Database with a MySQL application. The end result used is the result of the security process with the result key having no resemblance to the original record. Formation of keys based on user decisions. It is worth paying attention that the key should not be forgotten.

Securing Text File Using Combination of Vigenere and One – Time Pad Cipher Algorithm

Technological developments continue to increase, causing many crimes to occur on social media. There are various types of encryption that can be used. So we need a system to protect and prevent misuse of data by unauthorized parties. One of the techniques used in this study is the encryption method. Encryption is applied to user passwords on web login systems. Simulation results can be tested by measuring resistance to attacks or data theft. In this study, the Vigenere cipher was combined with the One-Time Pad cipher, which then produced encryption in the XOR results. Furthermore, the hash value that can be obtained by implementing the MD5 algorithm on encrypted files is used as a means of verifying encrypted files, further strengthening data security while confirming its integrity. Furthermore, the results show that the proper implementation of the algorithm affects data security positively. The test results were obtained with a value of 71%, which means that the encoding results are good enough for data security.

Application of the Vigenere Cipher Algorithm in Database Security of Employee Performance Values at the South Bengkulu Regency Education and Culture Office

Application of the Vigenere Cipher Algorithm in Database Security of Employee Performance Values at the South Bengkulu Regency Education and Culture Office

Preservation of Data Integrity in Public Cloud Using Enhanced Vigenere Cipher Based Obfuscation

Today’s internet world is moving to cloud computing to maintain their public data privately in a secure way. In cloud scenarios, many security principles are implemented to maintain the secure transmission of data over the internet. And still, the main concern is about maintaining the integrity of our own data in the public cloud. Mostly, research works concentrate on cryptographic techniques for secure sharing of data but there is no such mentioned works available for data integrity. In this paper, a data masking technique called obfuscation is implemented which is used to protect the data from unwanted modification by data breaching attacks. In this work, enhanced Vigenere encryption is used to perform obfuscation that maintains the privacy of the user’s data. Enhanced Vigenere encryption algorithm combined with intelligent rules to maintain the dissimilarity between the data masking to perform encryption with different sets of rules. This work mainly concentrates on data privacy with reduced time complexity for encryption and decryption.

Keamanan Pesan Menggunakan Kriptografi dan Steganografi Least Significant Bit pada File Citra Digital

In the current era, data security disturbances often occur, such as data theft by unwanted people. To overcome security problems can be handled using cryptography and steganography methods. The cryptography process generates random writing that can obscure the message making it difficult for others to read. However, cryptography itself is still too weak to secure messages, so steganography is needed to disguise the existence of the message so that it is not visible to the human eye. Apart from hiding messages, another goal is to know the impact of message insertion. In this study, the encryption steps were followed by insertion and decryption followed by extraction. In the secret message encryption process using two algorithms, namely Vigenere Cipher and Playfair Cipher. In the process of inserting a secret message using Least Significant Bit (LSB) steganography. The results of the combination of cryptography and steganography are able to secure secret messages without causing significant changes even though the digital image used before and after the steganography process has increased in size, the Mean Square Error (MSE) value obtained is 0.000136 and the Peak Signal to Noise Ratio (PSNR) value is obtained. 86.8062 dB and the result of message encryption is enough to obscure the relationship pattern in the modified secret message with an avalanche effect value of 53.06%.

Three Steps Polyalphabetic Substitution Cipher Practice Model using Vigenere Table for Encryption

Recently, cyberattacks on infrastructure have been continuously occurring with the starting of neutralizing the user authentication function of information systems. Accordingly, the vulnerabilities of system are increasing day by day, such as the increase in the vulnerabilities of the encryption system. In this paper, an alternative technique for the symmetric key algorithm has been developed in order to build the encryption algorithm that is not easy for beginners to understand and apply. Vigenere Cipher is a method of encrypting alphabetic text and it uses a simple form of polyalphabetic substitution. The encryption application system proposed in this study uses the simple form of polyalphabetic substitution method to present an application model that integrates the three steps of encryption table creation, encryption and decryption as a framework. The encryption of the original text is done using the Vigenère square or Vigenère table. When applying to the automatic generation of secret keys on the information system this model is expected that integrated authentication work, and analysis will be possible on target system. ubstitution alphabets[3].

Stream-keys generation based on graph labeling for strengthening Vigenere encryption

This paper address the cryptographic keys management problem: how to generate the cryptographic keys and apply them to secure encryption. The purpose of this research was to study on utilizing graph labeling for generating stream-keys and implementing the keys for strengthening Vigenere encryption. To achieve this objective, the research was carried out in four stages: developing an algorithm for generating stream-keys, testing the randomness of the constructed keys, implementing the eligible keys in a modified Vigenere encryption and, finally, analyzing the security of the encryption. As the result, most of stream-keys produced by the algorithm are random, and the implementation of the stream keys to the modified Vigenere cipher achieve good security. The contributions of this research are utilizing graph labeling to generate stream-keys and providing different encryption keys for different blocks in a block based cipher with low storage capacity. The novel technical results yielded from this research are the algorithm of developing the source of the stream-keys based on graph labeling, the algorithm of constructing the initial block keys, and the protocol of a modified Vigenere encryption using stream-keys and operated in cipher block chaining mode.

Modifikasi Algoritma Vigenere Cipher dengan Pembangkit Kunci Random Number Generator Dalam Pengamanan Citra Digital

Digital image is an image that can be processed by a computer. Digital images that are not allowed to be known by others or are said to be private and are not allowed to be manipulated by other irresponsible parties. The act of manipulating, hijacking or tapping the image will cause harm to the owner of the image. The technique to reduce these actions is to use cryptographic techniques. Cryptographic techniques are very well known for securing information with a password that only the owner of the image understands. To strengthen the results of the encryption carried out by the Vigenere Cipher Algorithm, modifications are made to the Random Number Generator. The Random Number Generator used is Linear Congruent Generator which has linear recursive properties combined with modulus. So the combination of vigenere cipher with random number generator Linear Congruent Generator is very difficult for other parties to abuse the image

Encrypted Short Message Service Design Using Combination of Modified Advanced Encryption Standard (AES) and Vigenere Cipher Algorithm


 Despite the popularity of social media and Internet-based messaging services, Short Message Service (SMS) is still widely used by a lot of people worldwide. However, in this modern era, Short Message Service (SMS) is not a secure way of sending and receive text messages. Anyone with the right privilleges can easily read all the messages sent using SMS service. Therefore, appropriate cryptographic algorithms should be applied to ensure confidentiality of the message content. In this paper, a modified AES with Vigenere Cipher Algorithm will be used to encrypt the text message, hence greatly increasing the security of the sent messages. Avalanche Effect is chosen as a metric for measuring performance of the proposed algorithm and its implementation. The proposed algorithm shows high Avalanche Effect compared to standard AES algorithm.

Implementation of combined steganography and cryptography vigenere cipher, caesar cipher and converting periodic tables for securing secret message

The development of the communication technology era has made it easier in the process of exchanging information from various parties. However, not all of the information provided can be used by many parties. Sometimes the information is intended for partial purposes only or is confidential. So, it is necessary to process information security. Several ways can be used such as cryptography. This method is used to encrypt messages or information. Methods that can be used in cryptography include vigenere cipher and caesar cipher methods. Both of these methods use the technique of replacing each original character with a character or letter. Substitution is based on keywords or character position shift command. However, this method is quite easy to solve by using the Brute Force method and the frequency of letters that often appear. Based on this problem, it is necessary to modify or combine it so that it is more difficult to crack. This research describes the combination of the vigenere cipher and the caesar cipher methods. The two methods were then converted to the names of the chemical elements in the periodic table. Furthermore, the steganography process is carried out as a place to insert messages or information. From this process, it is expected that the encryption results will be more difficult to crack

Key Generation for Vigenere Ciphering Based on Genetic Algorithm

Cryptography is a science securing of information. Encryption requires impregnable keys to encrypt or decrypt data these keys should be unpredictable and not easily to break. In this research we use genetic algorithm to generate keys for vigenere cipher. The best key is used to perform encryption. The keys created by genetic algorithm are tested for randomness by using the entropy test. The entropy calculation shows that randomness of key generated based on genetic processing is better than chosen key in the classical vigenere cipher.

University of Library Studies and Information Technologies

This paper provides implementations of three well-known ciphers – Caesar Cipher, Vigenere Cipher and Hill Cipher in Microsoft Excel. It is shown how the ciphers can be broken by using Brute-force Attack, Frequency Analysis Attack and Known-plaintext Attack. For the purpose of the cryptanalysis the relative occurrence frequencies of the letters and the index of coincidence (κ ) in Bulgarian language are determined. The classical Frequency Analysis Attack is modified using the cross-correlation between frequencies of letters in the natural language and the cipher text. Modular matrix operations in MS Excel are shown.

Pengamanan Citra Digital Berbasis Kriptografi Menggunakan Algoritma Vigenere Cipher

Cryptography is one of the most popular methods in data security by making data very difficult to read or even unreadable. One of the well-known techniques or algorithms in cryptography is Vigenere Cipher. This classic algorithm is classified as a polyalphabetic substitution cipher-based algorithm. Therefore, this algorithm tends to only handle data in text form. By this research, a console-based application has been developed which is made from PHP programming language to be able to encrypt and decrypt digital image media using Vigenere Cipher. The encryption process is done by first converting a digital image into a base64 encoding format so that the encryption process can be carried out using the tabula recta containing the radix-64 letter arrangement used for base64 encoding. Conversely, the decryption process is carried out by restoring the encrypted file using radix-64 letters, so we get the image file in the base64 encoding format. Then, the image with the base64 encoding format is decoded into the original file. The encryption process took less than 0,2 seconds and 0.19 seconds for the decryption process and 33.34% for average file size addition on the encrypted file from the original file size. Testing on ten different images with different sizes and dimensions showed a 100% success rate which means this research was successfully carried out.

Implementation Combination Cryptographic Algorithm Triangle Chain Cipher and Vigenere Cipher In Securing Data in 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.

Efficient data hiding method for videos based on adaptive inverted LSB332 and secure frame selection with enhanced Vigenere cipher

In recent years, the importance of information security has increased due to the growth in digital communication and steganography has come to the fore for secure communication. Steganography ensures that the secret data to be sent in a multimedia file such as text, picture or video embedded in a way that cannot be understood by third parties. Although image steganography has become popular recently, video steganography has also been widely used and preferred recently, due to its high data hiding capacity and robustness. This paper proposes a new data hiding algorithm in video steganography for effective frame selection, high embedding capacity and good visual quality. The proposed algorithm has two phases: frame selection and data hiding. In the first phase, the frame selection offers a rapid and impressive new method based on enhanced Vigenere. The most significant advantage of this algorithm is to achieve the same level of security without using complex operations such as chaotic systems used in existing methods. In the second phase, we have used adaptive LSB332 for data hiding, which embeds video files with high capacity, high PSNR and SSIM. When the experimental results evaluated, it was observed that the proposed method is over 65 dB PSNR value and 0.99 SSIM value at 20 kbits data capacity. It was also achieved approximately 55 dB and 50 dB PSNR value at 200 kbits and 500 kbits data capacities, respectively, where is no appreciable loss in the SSIM value. Compared to LSB332 based methods, the capacity increased by approximately 12% at same visual qualities. Furthermore, the visual quality of the proposed method is much better than other video data hiding methods, while the capacity increases by 19%.