Authentication of digital media has been done with the various scheme, one of them is a digital signature The main reason the technique of digital signature appears on the concerns of people when sending important documents and raises the thought that the file submitted is not changed when it is transmitted and the content is different when received by the recipient of the document The digital signature attached by the sender to the document can be used as a tool to ensure that the submitted document is authentic or not manipulated So research on digital signatures should be developed to improve its ability to provide security and prove the authenticity of the image This paper proposes a combination of three algorithms to the created digital signature, namely: Rivest — Shamir — Adleman (RSA), Vigenere Cipher and Message Digest 5 (MD 5) The proposed method also tested with various attacks to measure the reliability of digital signatures Various attacks which applied such as blurring, salt, and pepper, Gaussian filters Based on the attacking result, the smallest change occurred in the blurring attack has a very good PSNR is 867532 dB The experimental result proves the little change of image and filename can affect the validation result Then, it can be concluded that the proposed method suitable for image authentication

Digital image signature using triple protection cryptosystem (RSA, Vigenere, and MD5)

Cryptography is a current field of research at the\nmoment as it can be crucial to offer protection to extremely\ndelicate and confidential records from criminal wrongdoings\nthroughout transmission over the network. The vigenere cipher is\none of the standard cryptographic algorithms that prevent\nattackers from understanding the raw data throughout the\ntransmission. The traditional vigenere cipher encrypts only the\nalphabetic plaintext with a 26×26 vigenere table because it\nincludes only 26 English alphabets A to Z. The researcher\nextended the original vigenere table into 95×95 which introduces\nall possible characters, mathematical symbols, digits, and\npunctuations that are available on an ordinary QWERTY\nkeyboard layout that can be encrypted easily by this technique and\nconjointly introduced case sensitivity. The objective of this\nmodification makes the cryptanalysis procedure more difficult\nand increases the information security.

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A Modified Version of Vigenere Cipher using 95 95 Table

Secure routing of information is one of the major concerns of specialist working in the field of wireless sensor networks (WSNs) as sensor nodes gather information from the physical world and transmit to base stations for authorized users to access via the internet. In a WSN, sensor nodes are deployed most of the times in unattended locations where there is the possibility of authorized or unauthorized access. This and others have brought the need to secure transmitted information from intruders. Though there are many ways to provide security to a network, cryptography has been identified as the best way for these main three security requirements which include: data confidentiality, authentication, and integrity (CIA). In this paper, we present an overview of the present challenges in a WSN and outline a number of countermeasures to solve these challenges. To tackle the challenge of security encountered in existing WSN systems, we propose an efficient and robust encryption and decryption algorithms for secure communication. The major key feature of this algorithm is that it combines both substitution and transposition cipher techniques in order to achieve the encrypted text. The algorithm is the outcome of the inspection of various existing algorithms in this field.

Data Security in Wireless Sensor Networks: Attacks and Countermeasures

Cryptography is one amongst the foremost fields of study lately because it is critical to keep up the confidentiality of the info that is distributed over the network. There are a unit numerous cipher techniques out there for encrypting the messages like vern am cipher, mono-alphabetic cipher, poly-alphabetic cipher, etc. one amongst the foremost fashionable cipher techniques is that the vigenere cipher. It's a poly-alphabetic cipher technique that uses the vigenere table for the method of coding of alphabets. This paper extends the vigenere table with numerical knowledge, so the numbers may be encrypted exploitation this system. It combines the coding method of Vigenere and Modified Caesar Cipher for obtaining the cipher text from the given plaintext and key.

An Enhanced Cipher Technique Using Vigenere and Modified Caesar Cipher

Security of data or documents is a very important thing. Given that nowadays many exchange data electronically. It will result in a lot of processes that can compromise the security of data. Therefore, we need a way to be able to secure the important data that are not easily obtained by others who are not interested. One of the main that we can secure is the data in the form of text. The knowledge that can keep a message or data Cryptography is the science. In the event that the merger will be carried out or a combination of WAKE and Caesar Cipher methods. Mechanisms to improve security is to use encryption technology. Encryption is the conversion of an original text or plain text into the hidden text (cipher text) that usually berbetuk codes. And vice versa if the data is hidden the wish to be returned must decrypt it first. The step is to encrypt text data with the method and the result is encrypted WAKE back to Caesar Cipher method, so that the data to be kept secret remains safe.

Hybrid Cryptography WAKE (Word Auto Key Encryption) and Binary Caesar Cipher Method For Data Security

https://cyberleninka.org/article/n/1434175.pdf

Sudhakar

Papers

An Extended Hybridization of Vigenere and Caesar Cipher Techniques for Secure Communication