Vigenere Cipher Research Articles

Layered security model through integration of Vigenere and Hill Cipher in digital message encryption

The rapid development of digitalization has a significant impact on data and information protection. One approach to protecting data and information is through the use of cryptography. The research aims to combine the use of Vigenere and Hill Cipher algorithms in modeling to maintain the security and confidentiality of digital messages. The focus of this research is on the process of encrypting digital text messages. The layered security in this study takes advantage of the advantages of each algorithm. The combination of the two is designed to increase the complexity of encryption and reduce vulnerability to cryptanalytic attacks. The encryption process starts with using Vigenere Cipher for initial message encrypting, then the results are re-encrypted using Hill Cipher. Research shows that this layered security model can improve data security and make it more difficult for uninterested parties to decipher it. The combination of Vigenere's and Hill Cipher's algorithms could be one of the layered security alternatives to digital message encryption in an effort to protect information and data from security threats in the digital age.

Design of Reversible Quantum Vigenere Cryptographic Cipher in QCA and IBMQ Platforms for Secure Nanocommunication

Using cryptography correctly is crucial in the current situation to safeguard data and ensure data security during data transfer. In this digital era, messages must be appropriately encrypted and decoded to prevent data misuse and ensure its accessibility to the intended recipient. Conventional cryptography techniques mostly depend on the mathematical intricacy of the encoding functions and the shared key. One such encoding approach that we may take into consideration is the Vigenere cipher algorithm. In this study, we want to apply this strategy utilizing reversible logic with the assistance of two helpful tools, namely, IBM Quantum (IBMQ) and QCADesigner. The encoder and decoder circuits for the Vigenere cipher are therefore proposed in this work in QCADesigner by utilizing Peres and DG gates in quantum-dot cellular automata (QCA) that consist of a single layer with 42 cells for encryption and 47 cells for decryption. The proposed circuit outperforms the existing ones concerning area, cell count and latency. Given that the layouts’ energy consumption is assessed, it is guaranteed that the QCA nanodevice might serve as a stand-in platform for the creation of reversible circuits. The same simulation outcome was also obtained while building the identical circuits in a quantum presentation using IBMQ. The two applications are closely connected and both rely on quantum concepts. The outcomes are therefore verified for each of the two situations. The reversible Vigenere cipher technique enhances data security. Further sophisticated low-power nanoscale lossless nanocommunication architecture may be created with the help of the suggested circuits.

Symmetric Cryptography Modification Using Diffie Hellman On RDBMS

One of the most widely used and freely available RDBMS is MySQL. MySQL users generally do not care about the confidentiality of the contents stored in MySQL. The application of data confidentiality in MySQL generally only uses a username and password to protect MySQL but not its contents. Therefore, it is necessary to apply the confidentiality of the data content in MySQL so that thieves cannot obtain information from the data contained in MySQL by converting the contents of the text stored in MySQL into secret text. This research uses one of the symmetric cryptography, namely vigenere cipher to keep the text stored in MySQL secret. The disadvantage of symmetric cryptography compared to asymmetric is the same encryption and decryption keys. Therefore, this research modifies the key in symmetric cryptography using Diffie Hellman so that the key used becomes asymmetric. So that with symmetric cryptography using Diffie Hellman on the contents of the data stored in MySQL, MySQl gets better confidentiality of its data content

Foveal Avascular Zone Image Encryption using Pixel Scrambling Combination Technique for Medical Image Security

Data theft from year to year has increased in the era of big data and society 5.0. One area that requires data security is patient medical data. Medical image data security must be done to protect medical data security from data theft by third parties so that they cannot access the data. The development of Diabetic Retinopathy (DR) is also increasing every year. Determining the severity of DR is done by detecting the Foveal Avascular Zone (FAZ). Encryption is the process of changing a plain image into a cipher image. In this study, we compared the results of image quality and encryption time between the Vigenere Cipher method and a combination of pixel scrambling. The average encryption time of the tested FAZ images is 3.20 seconds. This result proves that the pixel combination method has a faster encryption time than the Vigenere Cipher. Vigenere Cipher encryption time is 4.96 seconds. The existence of the FAZ area with the pixel combination randomization method of the encryption process is also invisible, so third parties will not know about its existence.

Text security by using a combination of the vigenere cipher and the rubik's cube method of size 4×4×4

Background: In the current era of technology, information security is increasingly important. The growth of technology leads to a higher level of threat to the security of data and information dissemination, and cryptography is a valuable protective tool.Aim: The primary objective of this research is to enhance text security through the fusion of the Vigenere cipher and the Rubik's cube algorithm. By leveraging this novel approach, we aim to fortify the confidentiality of textual data against potential eavesdroppers and adversaries. To demonstrate the practicality of this method, we perform a simulation using the Python programming language within the Google Colab environment. Method: This study employs a qualitative research methodology supplemented by empirical simulation. The combination of the Vigenere Cipher and the Rubik's Cube algorithm in a 4×4×4 configuration is implemented to encrypt and decrypt text. The simulation is executed using the Google Colab platform, enabling a practical illustration of the encryption process.Result: The results of our research indicate the feasibility of generating ciphertext through the amalgamation of the Vigenere Cipher and the Rubik's Cube algorithm in the specified 4×4×4 configuration. The simulation conducted in Google Colab serves as concrete evidence of the effectiveness and practicality of this combined encryption method.Conclusion: In conclusion, this research offers a compelling approach to bolstering text security in the modern era of information technology. By combining the Vigenere Cipher with the Rubik's Cube algorithm in a 4×4×4 configuration, we have demonstrated the potential to significantly enhance the confidentiality of sensitive textual data. The empirical simulation conducted in Google Colab reaffirms the practicality and viability of this innovative encryption technique, highlighting its potential as a valuable tool in the realm of information security.

Encryption of Information on Brain Tumor Images Using Vigenere Cipher Algorithm and Least Significant Bits

Cryptography is a branch of existing methods in mathematics which has the goal of being able to maintain the confidentiality of the information contained in the data so that the information is not known by parties who have no interest. Confidentiality of this information is important so that the information sent is not misused irresponsibly. Vigenere Cipher is a method used for cryptography. Vigenere Cipher works by using a tabula recta table where the table contains an alphabet arranged based on the Caesar Cipher shift. In this study, the Vigenere Chiper algorithm will be used to encrypt information into 25 brain tumor images. In the tests carried out on 25 images, the best MSE obtained was 1.541e-05, while the best PSNR was 48.1219, for the best SSIM it was 0.99995, then for the BER value, all images obtained a BER value of 0 and also for the entropy of the best steganography image, which was 6.8204.

Historical research on classification of Classical Cryptography

Cryptography is now being applied frequently in peoples daily lives. Their bank passcode, computer password, and digital signature all are applications of cryptography. Inside cryptography, Classical Cipher is a basic and important area as modern cryptography is developed from Classical Cryptography. By making a consummate system of Classical Cryptography, it increases peoples interest in exploring basic cryptography principles. This essay focuses mainly on the topic of classification of Classical Cipher. By reading related materials like books, journals, magazines and so on, the historical research came out the conclusion as the Classical Cipher can be classified as Substitution Cipher, Polyalphabetic Substitution Cipher, and Transposition Cipher. In each class, the essay mentioned several cipher examples, how they encrypt and decrypt the text, and how they can be broken. Caesar Cipher, Simple Substitution Cipher are examples of Substitution Cipher. Vigenere Cipher is mainly discussed inside the Polyalphabetic Substitution Cipher section. In Transposition Cipher part, Scytale and Rail Fence Cipher are listed to demonstrate traits of the Transposition Cipher.

A Combination of Vigenere Cipher and Advanced Encryption Standard for Image Security

In an era where digital information security is paramount, this research addresses the pressing need for robust encryption methods. We propose a novel approach that combines the Vigenere Cipher and the Advanced Encryption Standard (AES) for secure digital image transmission. Our study recognizes the research gap in secure image transmission methods and aims to bridge it with a powerful encryption solution. We implement this hybrid encryption approach using the Vigenere Cipher in C++ and the AES algorithm in MATLAB. Our experiments validate the effectiveness of our program in concealing and restoring digital images during transmission. This hybrid encryption technique has promising applications in healthcare, military, and confidential business operations, bolstering image security in real-life scenarios. By enhancing image security, our research can contributed to safeguarding sensitive information in the digital age

Modifikasi Pembangkit Kunci Algoritma Vigenere Cipher Berdasarkan Pembangkit Bilangan Acak CSPRNG Untuk Mengamankan Citra Digital

The distribution of digital images in the current digital era is very rapid. The distribution of digital images has become a habit for every person every day, some are for public consumption and some are confidential. We can see the distribution of digital images in the use of social media, online shops, offices and government. Of course, everyone who distributes digital images does not want to lose the meaning of the digital image because people do bad work, or the digital image is misused by parties who do not have authority over the image, so it needs to be secured. Security issues have been an issue that has been discussed endlessly since the past until now. Information that is confidential, sensitive or of high value is kept secure so that it cannot be accessed by people who do not have authority over the information. Likewise with digital images, they must be safe from people who do not have authority over the image. Digital images can be secured using cryptographic algorithms. This research discusses how to modify the Vigenere cipher with a CSPRNG key generator based on the RSA algorithm. The Vigenere cipher is a classic cryptographic algorithm that utilizes key length as a strength to secure data and information. The longer the key applied, the more secure the encryption, and long keys must be random and unique. In this research, the key that will be used is a CSPRNG random number generator based on the RSA algorithm. The random numbers generated by this algorithm are believed to be very difficult for attackers to compute. By applying this algorithm to encrypt digital images, it is believed to be able to secure digital images, the pixel pattern in the image will be as random as possible. The transmitted digital image will be distributed in a random pixel pattern and will appear useless to attackers. The application of this algorithm is believed to be able to maintain digital image security.

Modifikasi algoritma Hill cipher dengan matriks kunci berupa matriks ketetanggaan

Cryptography is one of the parts in mathematics, especially applied mathematics. Cryptography is the science that studies how to secure information that we don't want others to know about the information we have. Based on the development of the times, cryptography is divided into two consisting of classical cryptography and modern cryptography. In this paper, the focus of discussion is on classical cryptography. Furthermore, there are many kinds of classical cryptographic algorithms, such as the Caesar cipher algorithm, the Playfair cipher algorithm, the Vigenere cipher algorithm, and the Hill Cipher algorithm. The focus of discussion in this paper is on the Hill cipher algorithm. The modifications made to the Hill cipher algorithm lie in its key matrix. In this paper, it will be shown how to encrypt and decrypt the message we want to send using the Hill cipher algorithm with the matrix being a adjacency matrix. In which case, the adjacency matrix itself is obtained from the representation of the graph. It is hoped that this algorithm can avoid crypt attacks, especially on ciphertext only-attack.Keywords: Hill cipher algorithm, cryptography, adjacency matrix, plaintext, ciphertextMSC2020: 94A60

File Cryptography Optimization Based on Vigenere Cipher and Advanced Encryption Standard (AES)

The rapid The main problem in the misuse of data used in crime is the result of a lack of file security. This study proposes a data security method to protect document files using the Advanced Encryption Standard (AES) algorithm combined with the Vigenere Cipher. This research carried out 2 processes, namely the encryption process and the decryption process. The encryption process will be carried out by the AES algorithm and then encrypted again with the Vigenere Cipher algorithm. The experiments show that the proposed method can encrypt files properly, where there are changes in the value of the document file and the encrypted file cannot be opened and the description results do not cause changes to the original file. The results of this study are that the system is able to work properly so as to produce file encryption and decryption using the AES method combined with the Vigenere Cipher. In document files, the largest difference in encryption and decryption time is 8 seconds, while in image files the difference in encryption and decryption time is 17 seconds. This longest time difference is generated by large files.

Modifikasi Vigenere Cipher Menggunakan Grup Simetri untuk Mengamankan Pesan Teks

Cryptography is widely used to overcome information security problems that are exchanged on the internet network. One of the algorithms in cryptography is the Vigenere Cipher, the algorithm is known as a robust method and is not easily solved. However, the Vigenere Cipher algorithm has a weakness, namely the key is short and is used repeatedly. Therefore, it is necessary to modify the Vigenere Cipher. The purpose of this study is to determine the modification of the Vigenere Cipher using a symmetric group and also to determine the level of security of the encryption results of Vigenere Cipher modification when compared to the Vigenere Cipher. The results obtained from this research is a new algorithm of the modification process of the Vigenere Cipher using symmetric groups. The modified Vigenere Cipher algorithm is proven to be stronger than the Vigenere Cipher. This is because the plaintext is scrambled first using a symmetric group encoding, so that the actual plaintext is safe against attacks by the Kasiski method and exhaustive key search. In addition, the resulting new algorithm also supports the use of capital letters, lowercase letters, numbers, and symbols.

Image Encryption and Decryption Using Vigenere Cipher with Compute Unified Device Architecture (CUDA)

Compute Unified Device Architecture (CUDA) adalah Application Programming Interface (API) NVIDIA dan platform yang memungkinkan akses langsung ke set instruksi GPU dan memberi dukungan untuk berinteraksi dengan GPU terkait komputasi paralel. Dengan CUDA, komputasi yang kompleks menjadi lebih cepat dan lebih efisien. Vigenere Cipher adalah kriptografi klasik populer yang mengimplementasikan kunci simetris dengan panjang tertentu. Pada penelitian ini, penerapan enkripsi dan dekripsi Vigenere Cipher dilakukan pada citra serta dengan CPU dan GPU (CUDA). Paralelisasi dengan CUDA menunjukkan hasil eksekusi waktu yang relatif lebih cepat daripada CPU. Persentase rata-rata penurunan waktu adalah 99,46 persen untuk enkripsi serta 99,47 persen untuk dekripsi.Persentase rata-rata penurunan waktu adalah 99,46 persen untuk enkripsi serta 99,47persen untuk dekripsi.

Hybrid Cryptosystem Algorithm Vigenere Cipher and Base64 for Text Message Security Utilizing Least Significant Bit (LSB) Steganography as Insert into Image

Security message text is aspect important in modern communications for guard privacy and confidentiality information. Without exists guarantee security, of course just can raises risk when sensitive and valuable information are accessed by unauthorized persons responsible answer. Cryptography and steganography is two field used in a manner wide For reach objective this. Algorithm Vigenere Cipher and Base64 are method used for encryption message text and Least Significant Bit (LSB) steganography was used as method for insert message encrypted to in image. LSB makes use of the last bits from pixels image for keep information addition without bother image visual display in a manner significant. With utilise method here, order encrypted can hidden in a manner confidential in image that looks normal. This hybrid cryptosystem combine excess from third algorithm such, ie speed and effectiveness encryption use algorithm Vigenere Cipher as well ability Base64 characteristics, and levels security message more increase.

UNJUK KERJA KOMBINASI METODE BASE64 ALGORITMA VIGNERE CHIPER DAN RAILFENCE CHIPER DALAM PENGAMANAN DATA VIDEO

Video files are information in the form of Video, Information becomes very vulnerable to be known, retrieved or even manipulated and misused by other parties who are not entitled. In this research combines the classic algorithm vigenere cipher with modren algorithm that is Railfance algorithm in securing video files, with the system built then every video file uploaded into the system will be translated into binary code with base64 technique which is plaintext and then will be encrypted with vigenere cipher algorithm and continued encryption using railfance algorithm and produce video file that can not be played , so Video files are considered damaged, when not. For decryption and vice versa video files that can not be played dupload into the system will be translated into binary code with base64 technique which is plaintext and then decrypted with railfance algorithm and continued decryption using vigenere cipher algorithm and produce video files that can be played. Key Word : video File, Base64, Algoritma Vigenere Cipher, Algoritma Railfance

Perbandingan algoritma kriptografi simon dan vigenere dalam mengamankan citra digital

Digital image files or images are sometimes a valuable asset. Digital images that are private and confidential are very vulnerable to interception by other parties, especially if the image is distributed via the internet. To increase the security of digital images so that their confidentiality can be maintained, a special technique is needed to protect digital image messages, namely with cryptographic techniques. This study aims to determine the performance of the SIMON algorithm for digital image security. SIMON algorithm performance results are compared with the vigenere cipher algorithm in terms of time and image file size produced. In this study used base64 encode for the encryption process and base64 decode for the decryption process. The performance of the SIMON algorithm in securing digital images results in an average encryption time of 969 ms and an average decryption time of 1537 ms. The SIMON algorithm requires a longer time for the encryption and decryption process when compared to the Vigenere algorithm. The cipher image encrypted by the SIMON algorithm has a size larger than the original file by 36%. However, when compared to the cipher image encrypted by the Vigenere algorithm, there is no significant difference. The UACI value obtained from the SIMON algorithm cipher image obtained an average yield of 18.94%. Based on the theory of differential analysis, it can be said that this value is still vulnerable to differential attack. This is based on the UACI value which has not met the minimum threshold value of 33%.

Cryptographic Technique for Communication System

Abstract: The Cryptography is gotten from a Greek word which implies the craft of ensuring data by changing it into a muddled organization and unreadable format. It is a mix of arithmetic and software engineering. The dynamite growth of the Internet has made an expanded familiarity with intrigue uncertainty issues. Even though security is the measure worries over the internet, numerous applications have been created and structured without considering fundamental destinations of data security that is confidentiality, authentication, and protection. As our day by day exercises become increasingly more dependent upon data networks, the significance of an understanding of such security issues and trouble will also increase. To forestall some undesirable clients or individuals to gain admittance to the data, cryptography is required. .This paper introduces a new hybrid security cipher by combining the three most important Ciphers such as Gronsfeld Cipher , Polybius Cipher and Vigenere Cipher.

Kombinasi Algoritma Kriptografi Vigenere Cipher dan SHA256 untuk Keamanan Basis Data

An organization must consider and manage the security of data storage in databases or databases, and special procedures are needed to protect data from various security risks. The problem in this study is that the population data contained in the Girisuko village administrative service information system has not been encrypted or secured. This can pose a risk that the data stored in the database can be intercepted and misused. In this study, the cryptographic technique used was a combination of the Vigenere Cipher and SHA 256 algorithms to secure or encrypt databases, especially population data in the Girisuko village administrative service information system. The text in the database is encrypted using the Vigenere Cipher, and SHA-256 is used to generate a hash value or a random value that is different from the text in the database. Messages will be encrypted using the Vigenere Cipher and then hashed with SHA-256 simultaneously. As a result, it will be difficult for an attacker to decrypt the text stored in the database because they have to break the Vigenere Cipher encryption, and also have to solve the hash value generated using SHA-256. This combination aims to increase security and maintain the confidentiality of messages from attackers. The application of the Vigenere Cipher and SHA to the village administration service information system application with a real-time database works well, as evidenced by the fast running-time of 0.39 seconds the data encryption process uses the Vigenere Cipher with 894,968 keys/second and an analyzed key length of 7 characters then text on population database successfully secured. By conducting this research, it is hoped that it can contribute to improving database system security.

Multistage Encryption for Text Using Steganography and Cryptography

Recently, the movement of data between smart devices has piqued the world's curiosity because it transmits important and unimportant data via the Internet. Thus, important data must be encrypted during passing over a network so that information can only access by an intended receiver and processed by it. As a result, information security has become even more critical than before. Our proposal suggests a method to secure data in three stages using cryptography and steganography. The important message will divide into two parts a part will encrypt by Caesar Cipher and another by Vigenere Cipher. The ciphertext will process by Morse code and will then hide in a cover image using Least Significant Bits (LSB) technique. According to the value the of peak signal-to-noise ratio (PSNR) obtained in this work our proposal has an extra security level and robustness. Finally, our research provides more security because of the mixture between cryptography and steganography.

IMPLEMENTATION OF STEGANOGRAPHY ON DIGITAL IMAGE WITH MODIFIED VIGENERE CIPHER ALGORITHM AND LEAST SIGNIFICANT BIT (LSB) METHOD

Digital image can be utilized as a media to hide messages. There should be a special treatment in securing the messages so that the information accessibility can be controlled. Hiding messages to an image can be conducted using steganography. It can be combined with cryptography algorithms in order to make it harder to be accessed by unauthorized parties. The modification of cryptography algorithms can improve the confidentiality of the message content. This research is aimed to know the implementation of steganography in desktop applications using Least Significant Bit (LSB) that is combined with the modification of Vigenere Cipher algorithms. The developed software namely waterfall supports the creation of applications. The result of the research shows that the encrypted picture will change into gray or display in grayscale so that the hidden message will be more difficult to be accessed by the attacker. The encrypted picture will also have a bigger size file than the original version and the extended file. The LSB method will work precisely according to the formula of the modified cryptography algorithm. The further research is suggested to focus on the variation of media for content message and the picture format in their encryption.