Security Analysis and Modification of Classical Encryption Scheme

International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022

This paper explores many important Symmetric and Asymmetric Cryptography algorithms and their essence in network security. As the use of the internet has grown, so have attacks on the communication channels. These attacks can be used by third parties to obtain sensitive data about your organization and its activities. This data can be used to compromise an organization's operations or blackmail the organisation to pay for the data. To avoid these situations, such algorithms are adapted to protect communications. These algorithms encrypt data that is nearly impossible for unauthorized persons to read, making it unusable for attackers. These algorithms therefore play an important role in the security of communications. This paper states a study of symmetric and asymmetric algorithms in terms of optimal resource allocation, potential attacks which can be used to exploit these algorithms, time consumption, power consumption, overall structure and some other basis Along with explanation of some of the security attacks.

2016

Cryptography is a very important tool for protecting information in Internet. Every time we connect to the Internet the browser uses appropriate cryptographic algorithms on our behalf. There are various cryptography techniques under the symmetric and asymmetric cryptosystem. The perfect selection of specific encryption scheme play important role to exchange the information and to enhance security objectives. The study is done some of the more popular cryptography algorithm currently in used. Practical cryptosystems are either symmetric or asymmetric in nature. This paper compares both the scheme on the basis of different parameter and also compares trendy encryption techniques for convinced selection of both key and cryptographic scheme. Finally this comprehensive analysis thrash outs the latest trends and research issues upon cryptographic elements to conclude forthcoming necessities related to cryptographic key, algorithm structure and enhanced privacy.

Cryptology consists of several mechanisms which ensure confidentiality and authenticity of the data. The fundamental objective of cryptology is the secure communication between sender and receiver through insecure channel. Modern cryptosystems can be broadly categorized in to secret key (symmetric) and public key (asymmetric) cryptosystems based up on the key which is used for data transmission. This paper focuses on the discussion of different categories of public key cryptosystems with its merits and demerits.

Cryptography means secret writing. When the data are transferred from sender to receiver over the network through information channel any third parties can intensively read and may modify the data. Here in this paper we elaborate how cryptography will help to secure the data between authorized people. In order to transfer secure data the data will convert to unreadable form before transmitting to the channel. The cryptography applications range have been expanded a lot in the modern area after the development of communication means; cryptography is essentially required to ensure that data are protected against penetrations and to prevent espionage. Also, cryptography is a powerful mean in securing e-commerce. This paper focuses on analysing different types of cryptography, concept of encryption and decryption, a brief introduction to cryptography techniques. If we are taking about security of information then following services come in mind i.e. Confidentiality (privacy of information), Authentication, Integrity (has not been altered) This paper also provides a detailed description of cryptography techniques in Symmetric encryption and a public key cryptography algorithm RSA in Asymmetric encryption.

Internet has revolutionized many aspects of our daily lives. Nowadays Internet is used for millions of applications. Many people depend on Internet for several activities like on-line banking, on-line shopping, on-line learning and on-line meetings etc. Huge amount of data travels over the network. Security of data over the network is a critical issue. Making a network secure involves a lot more than just keeping it free from programming errors. Network Security refers to the protection of valuable data against Interception, Interruption, Modification, Fabrication and Non-repudiation. Computer networks are inherently insecure so to protect data over the networks we need some mechanism. Cryptography came into existence to ensure data security. There are various threats to data: Backdoors, denial-of-service attack, direct-access attack, eavesdropping, exploits, indirect-attacks and social engineering and human-error. Cryptography provides protection against security threats. Cryptography means secret writing, the content of original text is scrambled to produce coded text and job of intruders becomes difficult. Secret-writing is the strongest tool of cryptography which protects the data. Cryptography is used to ensure confidentiality, integrity and availability of data by using private and public key cryptography algorithms. Private and Public key algorithms are used to transform original (readable) messages into unreadable jumbles. This paper describes the comparison of Private (symmetric) and Public (asymmetric) key algorithms.

Dorma Trading, Est. Publishing Manager, 2019

In modern world, security is the most valuable term in the field of communication system. Security comes along with many technologies and methods, where one of the most secure technologies is Cryptography where ordinary plain text is converted into cipher text for transferring data to the valid user. Cryptography algorithms can be divided into two types based on the number of keys such as Symmetric and Asymmetric where Symmetric algorithm works with one single key and Asymmetric algorithm works with two different keys. However, selecting the appropriate algorithms for specific application has been always a challenging task because of the latency, key size, and security issues. Cryptographic algorithms face different type of attacks like brute force attack, man in the middle attack, cycle attacks etc., which are still remained as threads. This paper presents the performance analysis, based on different performance metrics and threads, of various techniques of cryptographic algorithms and identifies the suitable algorithms for different types of applications.

IJSRD, 2013

Presently on a daily basis sharing the information over web is becoming a significant issue due to security problems. Thus lots of techniques are needed to protect the shared info in academic degree unsecured channel. The present work target cryptography to secure the data whereas causing inside the network. Encryption has come up as a solution, and plays an awfully necessary role in data security. This security mechanism uses some algorithms to scramble info into unclear text which can be exclusively being decrypted by party those possesses the associated key. This paper is expounded the varied forms of algorithmic rule for encryption & decryption: DES, AES, RSA, and Blowfish. It helps to hunt out the best algorithmic rule.

In this modern world of communications, cryptography has an important role in the security of data transmission and is the best method of data protection against passive and active fraud. Cryptography is an algorithmic process of converting a plain text or clear text message to a cipher text or cipher message based on an algorithm that both the sender and receiver know. There are a number of algorithms for performing encryption and decryption, but comparatively few such algorithms have stood the test of time. The most successful algorithms use a key. In this paper, we may gain knowledge about the cryptography algorithms and its role in Encryption and Decryption.

Communication in any language between two or more persons is like a plaintext or simple text. That means any person knowing that language can easily understand this plain text until this plaintext is codified in some manner. So, it is important to implement the coding techniques to ensure that information is hidden from everyone for whom it is not intended. So, that only authenticated person will be allowed to access the information. Cryptography is the art and science of achieving security by the encoding of messages in an unreadable form. Cryptography derives from the Greek word; the word "crypto" comes from kruptos, which means "hidden" and graphy means "writing". Thus, Cryptography is the practice and study of the hiding messages. Today, the cryptography is considered as branch for both the Computer Science and mathematics, which will related to the information theory.

Cryptography refers to the tools and techniques used to make messages secure for communication between the participants and make messages immune to attacks by hackers. For private communication through public network, cryptography plays a very crucial role. Cryptography is a method to provide information confidentiality, authenticity and integrity .Cryptography can be categorized into symmetric or asymmetric. In this paper we have defined and analyzed various cryptographic symmetric algorithms like DES, Triple DES, AES and asymmetric key cryptographic algorithms like RSA.

RF and Microwave …, 2004

Cryptography is the art and science of keeping massages secure. It is the study of techniques related to aspects of information security such as information privacy, integrity, authentication and non-repudiation. Cryptography is almost synonymous with encryption i.e. the conversion of plain text to a cryptic text to secure it against unauthorized users. Encryption techniques are typically divided into two generic types: symmetric key encryption and asymmetric key encryption. Encryption methods in which both the sender and receiver share the same key are referred to as symmetric key encryption schemes. Encryption methods in which encryption and decryption are performed using the different keys, one a public key and one a private key are referred to as asymmetric key encryption schemes. This paper provides a performance comparison between four popular and commonly used encryption algorithms: DES, 3DES, AES, and RSA. DES, 3DES, and AES are symmetric key encryption algorithms while as RSA is an asymmetric key encryption algorithm.

Information is a valuable asset and must be kept confidential, have integrity and be available in order to be worth its name and be credible. Therefore in a bid to ensure this, strong mathematical algorithms, that involve the use of a pair of keys which are different from one another (public and private) like the ones that are used by RSA and CISCO to mention but a few, are employed and used in the processes of data encryption and decryption. This system of using two keys, one public and the other private that are different but mathematically related, to secure information has given rise to the concept of Public Key Cryptography; a concept that attempts to use key management in ensuring the security of information and data against hacker's attacks while both in storage and moving over the internet from one place to another. This paper thus, sets out to analyze the working of the public key cryptography and find ways in which it can be improved to give better information security.

In recent years network security has become an important issue. Encryption has come up as a solution, and plays an important role in information security system. Many techniques are needed to protect the shared data. The present work focus on cryptography to secure the data while transmitting in the network. Firstly the data which is to be transmitted from sender to receiver in the network must be encrypted using the encryption algorithm in cryptography. Secondly, by using decryption technique the receiver can view the original data. In this paper we implemented three encrypt techniques like AES, DES and RSA algorithms and compared their performance of encrypt techniques based on the analysis of its stimulated time at the time of encryption and decryption. Experiments results are given to analyses the effectiveness of each algorithm.