scholarly journals Symmetric Encryption Algorithm using ASCII Values

2020 ◽  
Vol 8 (5) ◽  
pp. 2355-2359
Keyword(s):  
Random Number ◽  
Encryption Algorithm ◽  
Authorized User ◽  
Plain Text ◽  
Cipher Text ◽  
Minimum Value ◽  
Pseudo Random Number ◽  
Private Data ◽  
Key Length ◽  
The Right

Cryptography at its very core is nothing but math - pure, simple, undiluted math. Math created algorithms that are basics for various encryption algorithm. Encryption is a method in which user’s confidential data or private data is encoded to cipher text and this text can be read only if it is decrypted by authorized user using the right key. Cipher text can be decoded back to plain text, only by the authorized users using a right key. Various encryption algorithm are used to encrypt the plain text to cipher text and the cipher text is decrypted back to plain text by authorized user using right key. The symmetric key algorithm uses the same key to encrypt the plain text and decrypt the cipher text. In this paper we have proposed new symmetric algorithm using ASCII value. The plain text using key and ASCII values is converted to cipher text. Encryption algorithm sends cipher text and minimum value to the authorized receiver. Receiver decrypts the cipher text to plain text using same key and minimum value. In this algorithm sequence of five pseudo random number is generated and sum of this five pseudo random number is added to the obtained decimal value. Seed to generate common sequence of pseudo random number is kept secret between sender and receiver. Proposed algorithm support variable key length and plain text size. This algorithms performs faster when text is small message, but the execution time increases as the plain text size increases. This algorithm can be used to send small messages in a secured way. .

Cryptography

2011 ◽  
pp. 57-64
Author(s):  
Kevin Curran ◽  
Niall Smyth ◽  
Bryan McGrory
Keyword(s):  
Plain Text ◽  
Cipher Text ◽  
History Of ◽  
Secret Code ◽  
The Right ◽  
Original Information

One of the main methods of security is cryptography encrypting data so that only a person with the right key can decrypt it and make sense of the data. There are many forms of encryption, some more effective than others. Cryptography works by taking the original information and converting it with cipher text, which encrypts the information to an unreadable form. To decrypt the information we simply d the opposite and decipher the unreadable information back into plain text. This enciphering and deciphering of information is done using an algorithm called a cipher. A cipher is basically like a secret code, but the main difference between using a secret code and a cipher is that a secret code will only work at a level of meaning. This chapter discusses a little of the history of cryptography, some popular encryption methods, and also some of the issues regarding encryption, such as government restrictions.

scholarly journals Authorized Deduplication of Encrypted data in Cloud

2020 ◽  
pp. 541-546
Author(s):  
Milind B. Waghmare ◽  
Suhasini V. Padwekar
Keyword(s):  
Encryption Algorithm ◽  
Data Deduplication ◽  
Authorized User ◽  
Processing Power ◽  
Private Data ◽  
Merkle Hash Tree ◽  
User Data ◽  
Space Processing ◽  
Dynamic Updating ◽  
Convergent Algorithm

Cloud computing technology is rapidly developing nowadays. The number of files stored and processed is increasing per day. This increase brings severe challenge in requirement of space, processing power and bandwidth. More than half of the data generated in the cloud is duplicate data. To handle this data, deduplication technique is used which eliminates duplicate copies of data. This removal of duplicate data increases storage efficiency and reduce cost. In this paper, we propose secure role re-encryption system which allows authorized deduplication of data and also maintains privacy of data. This system is based on convergent algorithm and re-encryption algorithm that encrypts the user data and assign role keys to each user. This system grants privileges to users in order to maintain ownership of each user so that authorized users can access the data efficiently. In this system management center is introduced where the file is being encrypted and role keys are generated to handle authorized requests. Role keys are stored in Merkle hash tree which maps relationship between roles and keys. Authorized user who has particular role-encryption key can access the file. Convergent algorithm and role re-encryption algorithm allows access of specific file without leakage of private data. Dynamic updating of user privileges is achieved.

FPGA Implementation of Park-Miller Algorithm to Generate Sequence of 32-Bit Pseudo Random Key for Encryption and Decryption of Plain Text

2013 ◽  
Vol 2 (3) ◽  
pp. 99
Author(s):  
Bharatesh N ◽  
Rohith S
Keyword(s):  
High Speed ◽  
Random Number ◽  
Random Number Generator ◽  
Digital Circuit ◽  
Fpga Implementation ◽  
Random Numbers ◽  
Verilog Hdl ◽  
Plain Text ◽  
Booth Multiplier ◽  
Pseudo Random Number

There are many problems arises in randomized algorithms whose solutions are fundamentally based on assumptions that pure random numbers exist, so pseudo-random number generators can imitate randomness sufficiently well for most applications. The proposed scheme is a FPGA implementation of Park-Miller Algorithm for generating sequence of Pseudo-Random keys. The properties like High speed, low power and flexibility of designed PRNG(Pseudo Random Number Generator) makes any digital circuit faster and smaller. The algorithm uses a PRNG Module, it contains 32-bit Booth Multiplier, 32-bit Floating point divider and a FSM module. After generating a sequence of 32-bit Pseudo-Random numbers we have used these numbers as a key to Encrypt 128-bit plain text to become a cipher text and by using the same key to decrypt the encrypted data to get original Plain text. The Programming is done in Verilog-HDL, successfully synthesized and implemented in XILINX Spartan 3E FPGA kit.

scholarly journals Designing a secured audio based key generator for cryptographic symmetric key algorithms

2021 ◽  
Vol 2 (2) ◽  
pp. 87-94
Author(s):  
Avinash Krishnan Raghunath ◽  
Dimple Bharadwaj ◽  
M Prabhuram ◽  
Aju D
Keyword(s):  
Physical Environment ◽  
Random Number ◽  
Encryption Algorithm ◽  
Digital Networks ◽  
Plain Text ◽  
Audio Recordings ◽  
Cryptographic Keys ◽  
Mathematical Algorithms ◽  
Symmetric Key ◽  
Original Message

ryptography is a technique to secure data transmissions and ensure confiden-tiality, authenticity and integrity of data exchanged over the digital networks by utilizing mathematical algorithms to transform the plain text (original message) to cipher text (encrypted message) using a key or seed value. The general con-sensus regarding the use of non-deterministic true random numbers (TRN) which are generated from the physical environment such as entropy keys, at-mospheric noise, etc., as a public or private key has received limited encour-agement due to the demanding hardware requirements needed to extract the necessary data from the environment. Therefore, this research aims at design-ing and developing a lightweight program to generate a True Random Number (TRNG) key using live audio recordings which is further randomized using system date and time. These TRNs can be used to replace the deterministic pseudo random number cryptographic keys that are presently used by indus-tries for a symmetric key encryption algorithm which devolves the algorithm to being conditionally secured. Using the audio based TRNG key would render the same encryption algorithm as unconditionally secured.

Research on Improved AES Encryption Algorithm

2014 ◽  
Vol 989-994 ◽  
pp. 1861-1864
Author(s):  
Zi Heng Yang ◽  
Na Li ◽  
Li Yuan Liu ◽  
Ren Ji Qi ◽  
Ling Ling Yu
Keyword(s):  
Information Security ◽  
Random Number ◽  
Encryption Algorithm ◽  
Advanced Encryption Standard ◽  
Security Risk ◽  
Aes Algorithm ◽  
Logistic Mapping ◽  
Pseudo Random Number ◽  
Aes Encryption Algorithm ◽  
At Home

AES (Advanced Encryption Standard) in May 26, 2002 became effective standard. AES algorithm research has become a hot topic at home and abroad, and the algorithm has been widely applied in the field of information security. Since the algorithm of AES key expansion part is open, so the key is between the wheel can be derived from each other, the AES algorithm designed for this security risk by generating pseudo-random number. Logistic mapping a certain length, after quantization is used as a key to improve the security of the AES algorithm.

scholarly journals Security and Privacy of E-Health Data using Two Fish Encryption Algorithm

2020 ◽  
Vol 9 (1) ◽  
pp. 1906-1910
Keyword(s):  
Health Care ◽  
Security And Privacy ◽  
Encryption Algorithm ◽  
Smart Devices ◽  
Privacy And Security ◽  
Plain Text ◽  
Health Care Data ◽  
Server Side ◽  
Key Length ◽  
The Internet Of Things

The rapid growth development of the Internet of Things (IoT) has supported communication between various smart devices and it helps to exchange data between them. IoT is very highly demand topics between the researchers. The main goal of IoT in health care is to provide real time monitoring of the patient. But these new challenges also introduced the privacy and security to the health care data. Security is a major concern of the data. A system requires with authentic protocol for maintaining privacy of health care data. After going through all methodologies of the protocol encryption will be carried out of data of the health care with “two fish” encryption technique. At server side, it will automatically get decrypted after applying key. Two fish encryption algorithm is a block cipher algorithm of 128 bit. The key length vary until 256 bit. Key is divided in two parts as the first half of the key will encrypt the plain text and second half of the key will modify the encryption algorithm.

scholarly journals Transmission of Data in Secure Manner With DNA Sequence

2020 ◽  
Vol 5 (2) ◽  
pp. 75-81
Author(s):  
Ravinder Paspula ◽  
K. Chiranjeevi ◽  
S. Laxman Kumar
Keyword(s):  
Dna Sequence ◽  
Generation Process ◽  
Session Key ◽  
Authorized User ◽  
Plain Text ◽  
Cipher Text ◽  
Dna Cryptography ◽  
Level 1 ◽  
Two Stages ◽  
Level 2

A new-promising technology called DNA-Cryptography is emerged in the area of DNA- Computing field.DNA useful for store, sending the data and also to perform computation. Even it is under primal level, DNA-Based molecular Cryptography system is shows extremely efficient. This technique offers a unique cipher-text generation process and a new key generation practice. This method used to implement a procedure which includes two stages. First stage generates a session key and encryption key and it uses cipher block chaining mode-CBC, the secrete number(s) and incorporate plain-text M into level-1 cipher-text. The last stage converts the level-1 cipher-text into level-2 cipher-text (s). The level-2 cipher-text is again transformed into human made DNA-sequence (S’) and is given to the receiver along with many other DNA-sequence. By this process it will become a more complicated for un-authorized user to gain original information. The receiver will apply the process to identify the human made DNA sequence with M hidden in it and extract the original message M.

scholarly journals Implementasi Algoritma Rot Dan Subtitusional Block Cipher Dalam Mengamankan Data

2017 ◽  
pp. 73-79
Author(s):  
Ayu Pratiwi
Keyword(s):  
Information System ◽  
Information Systems ◽  
Block Cipher ◽  
Rapid Development ◽  
Encryption Algorithm ◽  
New Techniques ◽  
Plain Text ◽  
Cipher Text ◽  
Processing Data ◽  
Confidential Data

The security and confidentiality of data is one of the most important aspects in the information system at this time. Caused by the rapid development of science and technology that allows the emergence of new techniques, which are misused by certain parties that threaten the security of information systems. In general, the data are categorized into two, namely confidential data and data that is not confidential. Data that is not confidential is usually not too much attention. What really needs to be considered is confidential data, where every information contained in it will be very valuable for those who need it because the data can be easily duplicated. The ROT-n algorithm is one simple encryption algorithm that uses alphabetical shifts as much as n to convert plain text into cipher text, whereas Block ciphers work by processing data in blocks, where several characters / data are combined into one block. Each one block process produces one block output as well.

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